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Finding the Fourth Proportional to 285,134.63, 393,479.71 and 156,073.07

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Solution

The fourth proportional to 285,134.63, 393,479.71 and 156,073.07 is: 215,377.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,134.63 : 393,479.71 = 156,073.07 : x
  2. Step 2: Convert to fraction form
    285,134.63/393,479.71 = 156,073.07/x
  3. Step 3: Cross multiply
    285,134.63x = 393,479.71 × 156,073.07
  4. Step 4: Simplify right side
    285,134.63x = 61,411,586,915.93
  5. Step 5: Solve for x
    x = 61,411,586,915.93/285,134.63
  6. Step 6: Final answer
    x = 215,377.51

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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.