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Finding the Fourth Proportional to 553,521.36, 763,757.94 and 311,752.20

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Solution

The fourth proportional to 553,521.36, 763,757.94 and 311,752.20 is: 430,160.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,521.36 : 763,757.94 = 311,752.20 : x
  2. Step 2: Convert to fraction form
    553,521.36/763,757.94 = 311,752.20/x
  3. Step 3: Cross multiply
    553,521.36x = 763,757.94 × 311,752.20
  4. Step 4: Simplify right side
    553,521.36x = 238,103,218,062.47
  5. Step 5: Solve for x
    x = 238,103,218,062.47/553,521.36
  6. Step 6: Final answer
    x = 430,160.85

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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.