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Finding the Fourth Proportional to 285,966.96, 428,555.88 and 215,768.40

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Solution

The fourth proportional to 285,966.96, 428,555.88 and 215,768.40 is: 323,354.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,966.96 : 428,555.88 = 215,768.40 : x
  2. Step 2: Convert to fraction form
    285,966.96/428,555.88 = 215,768.40/x
  3. Step 3: Cross multiply
    285,966.96x = 428,555.88 × 215,768.40
  4. Step 4: Simplify right side
    285,966.96x = 92,468,816,538.19
  5. Step 5: Solve for x
    x = 92,468,816,538.19/285,966.96
  6. Step 6: Final answer
    x = 323,354.90

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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.