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Finding the Fourth Proportional to 485,480.80, 727,443.60 and 307,669.60

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Solution

The fourth proportional to 485,480.80, 727,443.60 and 307,669.60 is: 461,011.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,480.80 : 727,443.60 = 307,669.60 : x
  2. Step 2: Convert to fraction form
    485,480.80/727,443.60 = 307,669.60/x
  3. Step 3: Cross multiply
    485,480.80x = 727,443.60 × 307,669.60
  4. Step 4: Simplify right side
    485,480.80x = 223,812,281,434.56
  5. Step 5: Solve for x
    x = 223,812,281,434.56/485,480.80
  6. Step 6: Final answer
    x = 461,011.60

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1.5x scale

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.