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Finding the Fourth Proportional to 621,000.10, 931,500.15 and 530,458.30

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Solution

The fourth proportional to 621,000.10, 931,500.15 and 530,458.30 is: 795,687.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,000.10 : 931,500.15 = 530,458.30 : x
  2. Step 2: Convert to fraction form
    621,000.10/931,500.15 = 530,458.30/x
  3. Step 3: Cross multiply
    621,000.10x = 931,500.15 × 530,458.30
  4. Step 4: Simplify right side
    621,000.10x = 494,121,986,018.75
  5. Step 5: Solve for x
    x = 494,121,986,018.75/621,000.10
  6. Step 6: Final answer
    x = 795,687.45

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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.