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Finding the Fourth Proportional to 781,280, 1,078,136.48 and 441,755.36

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Solution

The fourth proportional to 781,280, 1,078,136.48 and 441,755.36 is: 609,605.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,280 : 1,078,136.48 = 441,755.36 : x
  2. Step 2: Convert to fraction form
    781,280/1,078,136.48 = 441,755.36/x
  3. Step 3: Cross multiply
    781,280x = 1,078,136.48 × 441,755.36
  4. Step 4: Simplify right side
    781,280x = 476,272,568,851.53
  5. Step 5: Solve for x
    x = 476,272,568,851.53/781,280
  6. Step 6: Final answer
    x = 609,605.48

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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.