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Finding the Fourth Proportional to 553,411.17, 763,576.11 and 311,645.61

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Solution

The fourth proportional to 553,411.17, 763,576.11 and 311,645.61 is: 429,997.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,411.17 : 763,576.11 = 311,645.61 : x
  2. Step 2: Convert to fraction form
    553,411.17/763,576.11 = 311,645.61/x
  3. Step 3: Cross multiply
    553,411.17x = 763,576.11 × 311,645.61
  4. Step 4: Simplify right side
    553,411.17x = 237,965,142,582.38
  5. Step 5: Solve for x
    x = 237,965,142,582.38/553,411.17
  6. Step 6: Final answer
    x = 429,997.00

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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.