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Finding the Fourth Proportional to 393,053.99, 542,359.82 and 220,947.62

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Solution

The fourth proportional to 393,053.99, 542,359.82 and 220,947.62 is: 304,876.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,053.99 : 542,359.82 = 220,947.62 : x
  2. Step 2: Convert to fraction form
    393,053.99/542,359.82 = 220,947.62/x
  3. Step 3: Cross multiply
    393,053.99x = 542,359.82 × 220,947.62
  4. Step 4: Simplify right side
    393,053.99x = 119,833,110,307.89
  5. Step 5: Solve for x
    x = 119,833,110,307.89/393,053.99
  6. Step 6: Final answer
    x = 304,876.97

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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.