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Finding the Fourth Proportional to 657,002.16, 906,599.93 and 399,020.28

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Solution

The fourth proportional to 657,002.16, 906,599.93 and 399,020.28 is: 550,609.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,002.16 : 906,599.93 = 399,020.28 : x
  2. Step 2: Convert to fraction form
    657,002.16/906,599.93 = 399,020.28/x
  3. Step 3: Cross multiply
    657,002.16x = 906,599.93 × 399,020.28
  4. Step 4: Simplify right side
    657,002.16x = 361,751,755,921.48
  5. Step 5: Solve for x
    x = 361,751,755,921.48/657,002.16
  6. Step 6: Final answer
    x = 550,609.69

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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.