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Finding the Fourth Proportional to 621,017.40, 931,526.10 and 532,443.90

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Solution

The fourth proportional to 621,017.40, 931,526.10 and 532,443.90 is: 798,665.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,017.40 : 931,526.10 = 532,443.90 : x
  2. Step 2: Convert to fraction form
    621,017.40/931,526.10 = 532,443.90/x
  3. Step 3: Cross multiply
    621,017.40x = 931,526.10 × 532,443.90
  4. Step 4: Simplify right side
    621,017.40x = 495,985,389,635.79
  5. Step 5: Solve for x
    x = 495,985,389,635.79/621,017.40
  6. Step 6: Final answer
    x = 798,665.85

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.