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Finding the Fourth Proportional to 438,593.49, 605,264.13 and 257,308.53

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Solution

The fourth proportional to 438,593.49, 605,264.13 and 257,308.53 is: 355,088.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,593.49 : 605,264.13 = 257,308.53 : x
  2. Step 2: Convert to fraction form
    438,593.49/605,264.13 = 257,308.53/x
  3. Step 3: Cross multiply
    438,593.49x = 605,264.13 × 257,308.53
  4. Step 4: Simplify right side
    438,593.49x = 155,739,623,552.03
  5. Step 5: Solve for x
    x = 155,739,623,552.03/438,593.49
  6. Step 6: Final answer
    x = 355,088.77

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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.