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Finding the Fourth Proportional to 386,315.10, 579,472.65 and 197,358.30

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Solution

The fourth proportional to 386,315.10, 579,472.65 and 197,358.30 is: 296,037.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,315.10 : 579,472.65 = 197,358.30 : x
  2. Step 2: Convert to fraction form
    386,315.10/579,472.65 = 197,358.30/x
  3. Step 3: Cross multiply
    386,315.10x = 579,472.65 × 197,358.30
  4. Step 4: Simplify right side
    386,315.10x = 114,363,737,100.50
  5. Step 5: Solve for x
    x = 114,363,737,100.50/386,315.10
  6. Step 6: Final answer
    x = 296,037.45

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Similar ratio
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1.5x scale

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.