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Finding the Fourth Proportional to 485,434.32, 728,150.85 and 130,448.34

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Solution

The fourth proportional to 485,434.32, 728,150.85 and 130,448.34 is: 195,672.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,434.32 : 728,150.85 = 130,448.34 : x
  2. Step 2: Convert to fraction form
    485,434.32/728,150.85 = 130,448.34/x
  3. Step 3: Cross multiply
    485,434.32x = 728,150.85 × 130,448.34
  4. Step 4: Simplify right side
    485,434.32x = 94,986,071,798.59
  5. Step 5: Solve for x
    x = 94,986,071,798.59/485,434.32
  6. Step 6: Final answer
    x = 195,672.34

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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.