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Finding the Fourth Proportional to 661,091.40, 991,637.10 and 544,451.40

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Solution

The fourth proportional to 661,091.40, 991,637.10 and 544,451.40 is: 816,677.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,091.40 : 991,637.10 = 544,451.40 : x
  2. Step 2: Convert to fraction form
    661,091.40/991,637.10 = 544,451.40/x
  3. Step 3: Cross multiply
    661,091.40x = 991,637.10 × 544,451.40
  4. Step 4: Simplify right side
    661,091.40x = 539,898,207,386.94
  5. Step 5: Solve for x
    x = 539,898,207,386.94/661,091.40
  6. Step 6: Final answer
    x = 816,677.10

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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.