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Finding the Fourth Proportional to 663,196.41, 915,225.89 and 391,330.44

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Solution

The fourth proportional to 663,196.41, 915,225.89 and 391,330.44 is: 540,044.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,196.41 : 915,225.89 = 391,330.44 : x
  2. Step 2: Convert to fraction form
    663,196.41/915,225.89 = 391,330.44/x
  3. Step 3: Cross multiply
    663,196.41x = 915,225.89 × 391,330.44
  4. Step 4: Simplify right side
    663,196.41x = 358,155,748,276.44
  5. Step 5: Solve for x
    x = 358,155,748,276.44/663,196.41
  6. Step 6: Final answer
    x = 540,044.76

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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.