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Finding the Fourth Proportional to 485,411.40, 728,117.10 and 453,918.60

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Solution

The fourth proportional to 485,411.40, 728,117.10 and 453,918.60 is: 680,877.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,411.40 : 728,117.10 = 453,918.60 : x
  2. Step 2: Convert to fraction form
    485,411.40/728,117.10 = 453,918.60/x
  3. Step 3: Cross multiply
    485,411.40x = 728,117.10 × 453,918.60
  4. Step 4: Simplify right side
    485,411.40x = 330,505,894,668.06
  5. Step 5: Solve for x
    x = 330,505,894,668.06/485,411.40
  6. Step 6: Final answer
    x = 680,877.90

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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.