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Finding the Fourth Proportional to 386,293.76, 579,444.96 and 254,006.72

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Solution

The fourth proportional to 386,293.76, 579,444.96 and 254,006.72 is: 381,012.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,293.76 : 579,444.96 = 254,006.72 : x
  2. Step 2: Convert to fraction form
    386,293.76/579,444.96 = 254,006.72/x
  3. Step 3: Cross multiply
    386,293.76x = 579,444.96 × 254,006.72
  4. Step 4: Simplify right side
    386,293.76x = 147,182,913,710.13
  5. Step 5: Solve for x
    x = 147,182,913,710.13/386,293.76
  6. Step 6: Final answer
    x = 381,012.92

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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.