Home / 285,442.79-393,911.10-156,381.84

Finding the Fourth Proportional to 285,442.79, 393,911.10 and 156,381.84

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Solution

The fourth proportional to 285,442.79, 393,911.10 and 156,381.84 is: 215,806.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,442.79 : 393,911.10 = 156,381.84 : x
  2. Step 2: Convert to fraction form
    285,442.79/393,911.10 = 156,381.84/x
  3. Step 3: Cross multiply
    285,442.79x = 393,911.10 × 156,381.84
  4. Step 4: Simplify right side
    285,442.79x = 61,600,542,614.42
  5. Step 5: Solve for x
    x = 61,600,542,614.42/285,442.79
  6. Step 6: Final answer
    x = 215,806.97

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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.