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Finding the Fourth Proportional to 285,412.67, 393,867.72 and 156,352.40

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Solution

The fourth proportional to 285,412.67, 393,867.72 and 156,352.40 is: 215,765.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,412.67 : 393,867.72 = 156,352.40 : x
  2. Step 2: Convert to fraction form
    285,412.67/393,867.72 = 156,352.40/x
  3. Step 3: Cross multiply
    285,412.67x = 393,867.72 × 156,352.40
  4. Step 4: Simplify right side
    285,412.67x = 61,582,163,304.53
  5. Step 5: Solve for x
    x = 61,582,163,304.53/285,412.67
  6. Step 6: Final answer
    x = 215,765.35

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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.