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Finding the Fourth Proportional to 661,531.79, 913,428.10 and 508,328.49

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Solution

The fourth proportional to 661,531.79, 913,428.10 and 508,328.49 is: 701,888.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,531.79 : 913,428.10 = 508,328.49 : x
  2. Step 2: Convert to fraction form
    661,531.79/913,428.10 = 508,328.49/x
  3. Step 3: Cross multiply
    661,531.79x = 913,428.10 × 508,328.49
  4. Step 4: Simplify right side
    661,531.79x = 464,321,525,428.97
  5. Step 5: Solve for x
    x = 464,321,525,428.97/661,531.79
  6. Step 6: Final answer
    x = 701,888.45

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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.