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Finding the Fourth Proportional to 385,717.32, 578,630.70 and 119,498.76

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Solution

The fourth proportional to 385,717.32, 578,630.70 and 119,498.76 is: 179,265.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,717.32 : 578,630.70 = 119,498.76 : x
  2. Step 2: Convert to fraction form
    385,717.32/578,630.70 = 119,498.76/x
  3. Step 3: Cross multiply
    385,717.32x = 578,630.70 × 119,498.76
  4. Step 4: Simplify right side
    385,717.32x = 69,145,651,147.93
  5. Step 5: Solve for x
    x = 69,145,651,147.93/385,717.32
  6. Step 6: Final answer
    x = 179,265.09

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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.