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Finding the Fourth Proportional to 514,870.40, 772,305.60 and 425,640.80

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Solution

The fourth proportional to 514,870.40, 772,305.60 and 425,640.80 is: 638,461.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    514,870.40 : 772,305.60 = 425,640.80 : x
  2. Step 2: Convert to fraction form
    514,870.40/772,305.60 = 425,640.80/x
  3. Step 3: Cross multiply
    514,870.40x = 772,305.60 × 425,640.80
  4. Step 4: Simplify right side
    514,870.40x = 328,724,773,428.48
  5. Step 5: Solve for x
    x = 328,724,773,428.48/514,870.40
  6. Step 6: Final answer
    x = 638,461.20

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Similar ratio
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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.