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Finding the Fourth Proportional to 389,079.32, 536,930.40 and 217,008.42

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Solution

The fourth proportional to 389,079.32, 536,930.40 and 217,008.42 is: 299,472.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,079.32 : 536,930.40 = 217,008.42 : x
  2. Step 2: Convert to fraction form
    389,079.32/536,930.40 = 217,008.42/x
  3. Step 3: Cross multiply
    389,079.32x = 536,930.40 × 217,008.42
  4. Step 4: Simplify right side
    389,079.32x = 116,518,416,554.26
  5. Step 5: Solve for x
    x = 116,518,416,554.26/389,079.32
  6. Step 6: Final answer
    x = 299,472.14

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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.