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Finding the Fourth Proportional to 423,045.60, 634,414.80 and 212,613.60

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Solution

The fourth proportional to 423,045.60, 634,414.80 and 212,613.60 is: 318,843.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,045.60 : 634,414.80 = 212,613.60 : x
  2. Step 2: Convert to fraction form
    423,045.60/634,414.80 = 212,613.60/x
  3. Step 3: Cross multiply
    423,045.60x = 634,414.80 × 212,613.60
  4. Step 4: Simplify right side
    423,045.60x = 134,885,214,521.28
  5. Step 5: Solve for x
    x = 134,885,214,521.28/423,045.60
  6. Step 6: Final answer
    x = 318,843.20

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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.