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Finding the Fourth Proportional to 612,116.70, 918,175.05 and 238,139.70

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Solution

The fourth proportional to 612,116.70, 918,175.05 and 238,139.70 is: 357,209.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,116.70 : 918,175.05 = 238,139.70 : x
  2. Step 2: Convert to fraction form
    612,116.70/918,175.05 = 238,139.70/x
  3. Step 3: Cross multiply
    612,116.70x = 918,175.05 × 238,139.70
  4. Step 4: Simplify right side
    612,116.70x = 218,653,930,954.49
  5. Step 5: Solve for x
    x = 218,653,930,954.49/612,116.70
  6. Step 6: Final answer
    x = 357,209.55

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Double scale
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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.