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Finding the Fourth Proportional to 777,430.80, 1,072,487.88 and 454,943.04

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Solution

The fourth proportional to 777,430.80, 1,072,487.88 and 454,943.04 is: 627,606.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,430.80 : 1,072,487.88 = 454,943.04 : x
  2. Step 2: Convert to fraction form
    777,430.80/1,072,487.88 = 454,943.04/x
  3. Step 3: Cross multiply
    777,430.80x = 1,072,487.88 × 454,943.04
  4. Step 4: Simplify right side
    777,430.80x = 487,920,896,490.36
  5. Step 5: Solve for x
    x = 487,920,896,490.36/777,430.80
  6. Step 6: Final answer
    x = 627,606.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.