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Finding the Fourth Proportional to 621,151.20, 931,726.80 and 621,151.20

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Solution

The fourth proportional to 621,151.20, 931,726.80 and 621,151.20 is: 931,726.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,151.20 : 931,726.80 = 621,151.20 : x
  2. Step 2: Convert to fraction form
    621,151.20/931,726.80 = 621,151.20/x
  3. Step 3: Cross multiply
    621,151.20x = 931,726.80 × 621,151.20
  4. Step 4: Simplify right side
    621,151.20x = 578,743,219,892.16
  5. Step 5: Solve for x
    x = 578,743,219,892.16/621,151.20
  6. Step 6: Final answer
    x = 931,726.80

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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.