Home / 621,011.40-931,517.10-306,083.40

Finding the Fourth Proportional to 621,011.40, 931,517.10 and 306,083.40

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Solution

The fourth proportional to 621,011.40, 931,517.10 and 306,083.40 is: 459,125.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,011.40 : 931,517.10 = 306,083.40 : x
  2. Step 2: Convert to fraction form
    621,011.40/931,517.10 = 306,083.40/x
  3. Step 3: Cross multiply
    621,011.40x = 931,517.10 × 306,083.40
  4. Step 4: Simplify right side
    621,011.40x = 285,121,921,126.14
  5. Step 5: Solve for x
    x = 285,121,921,126.14/621,011.40
  6. Step 6: Final answer
    x = 459,125.10

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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.