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Finding the Fourth Proportional to 284,003.72, 391,925.08 and 156,679.30

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Solution

The fourth proportional to 284,003.72, 391,925.08 and 156,679.30 is: 216,217.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,003.72 : 391,925.08 = 156,679.30 : x
  2. Step 2: Convert to fraction form
    284,003.72/391,925.08 = 156,679.30/x
  3. Step 3: Cross multiply
    284,003.72x = 391,925.08 × 156,679.30
  4. Step 4: Simplify right side
    284,003.72x = 61,406,547,186.84
  5. Step 5: Solve for x
    x = 61,406,547,186.84/284,003.72
  6. Step 6: Final answer
    x = 216,217.40

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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.