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Finding the Fourth Proportional to 485,701.80, 727,775.10 and 307,890.60

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Solution

The fourth proportional to 485,701.80, 727,775.10 and 307,890.60 is: 461,342.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,701.80 : 727,775.10 = 307,890.60 : x
  2. Step 2: Convert to fraction form
    485,701.80/727,775.10 = 307,890.60/x
  3. Step 3: Cross multiply
    485,701.80x = 727,775.10 × 307,890.60
  4. Step 4: Simplify right side
    485,701.80x = 224,075,112,204.06
  5. Step 5: Solve for x
    x = 224,075,112,204.06/485,701.80
  6. Step 6: Final answer
    x = 461,342.97

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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.