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Finding the Fourth Proportional to 657,695.40, 986,543.10 and 551,407.20

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Solution

The fourth proportional to 657,695.40, 986,543.10 and 551,407.20 is: 827,110.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,695.40 : 986,543.10 = 551,407.20 : x
  2. Step 2: Convert to fraction form
    657,695.40/986,543.10 = 551,407.20/x
  3. Step 3: Cross multiply
    657,695.40x = 986,543.10 × 551,407.20
  4. Step 4: Simplify right side
    657,695.40x = 543,986,968,450.32
  5. Step 5: Solve for x
    x = 543,986,968,450.32/657,695.40
  6. Step 6: Final answer
    x = 827,110.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.