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Finding the Fourth Proportional to 522,939.64, 721,417.02 and 307,976.80

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Solution

The fourth proportional to 522,939.64, 721,417.02 and 307,976.80 is: 424,866.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,939.64 : 721,417.02 = 307,976.80 : x
  2. Step 2: Convert to fraction form
    522,939.64/721,417.02 = 307,976.80/x
  3. Step 3: Cross multiply
    522,939.64x = 721,417.02 × 307,976.80
  4. Step 4: Simplify right side
    522,939.64x = 222,179,705,285.14
  5. Step 5: Solve for x
    x = 222,179,705,285.14/522,939.64
  6. Step 6: Final answer
    x = 424,866.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.