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Finding the Fourth Proportional to 284,358.72, 392,411.88 and 157,031.76

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Solution

The fourth proportional to 284,358.72, 392,411.88 and 157,031.76 is: 216,702.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,358.72 : 392,411.88 = 157,031.76 : x
  2. Step 2: Convert to fraction form
    284,358.72/392,411.88 = 157,031.76/x
  3. Step 3: Cross multiply
    284,358.72x = 392,411.88 × 157,031.76
  4. Step 4: Simplify right side
    284,358.72x = 61,621,128,161.31
  5. Step 5: Solve for x
    x = 61,621,128,161.31/284,358.72
  6. Step 6: Final answer
    x = 216,702.09

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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.