Home / 485,723.20-729,967.20-424,897.60

Finding the Fourth Proportional to 485,723.20, 729,967.20 and 424,897.60

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Solution

The fourth proportional to 485,723.20, 729,967.20 and 424,897.60 is: 638,555.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,723.20 : 729,967.20 = 424,897.60 : x
  2. Step 2: Convert to fraction form
    485,723.20/729,967.20 = 424,897.60/x
  3. Step 3: Cross multiply
    485,723.20x = 729,967.20 × 424,897.60
  4. Step 4: Simplify right side
    485,723.20x = 310,161,311,358.72
  5. Step 5: Solve for x
    x = 310,161,311,358.72/485,723.20
  6. Step 6: Final answer
    x = 638,555.69

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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.