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Finding the Fourth Proportional to 672,905.07, 928,502.46 and 400,966.20

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Solution

The fourth proportional to 672,905.07, 928,502.46 and 400,966.20 is: 553,269.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,905.07 : 928,502.46 = 400,966.20 : x
  2. Step 2: Convert to fraction form
    672,905.07/928,502.46 = 400,966.20/x
  3. Step 3: Cross multiply
    672,905.07x = 928,502.46 × 400,966.20
  4. Step 4: Simplify right side
    672,905.07x = 372,298,103,076.85
  5. Step 5: Solve for x
    x = 372,298,103,076.85/672,905.07
  6. Step 6: Final answer
    x = 553,269.87

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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.