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Finding the Fourth Proportional to 631,521.10, 871,488.95 and 345,035.03

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Solution

The fourth proportional to 631,521.10, 871,488.95 and 345,035.03 is: 476,142.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,521.10 : 871,488.95 = 345,035.03 : x
  2. Step 2: Convert to fraction form
    631,521.10/871,488.95 = 345,035.03/x
  3. Step 3: Cross multiply
    631,521.10x = 871,488.95 × 345,035.03
  4. Step 4: Simplify right side
    631,521.10x = 300,694,216,461.47
  5. Step 5: Solve for x
    x = 300,694,216,461.47/631,521.10
  6. Step 6: Final answer
    x = 476,142.79

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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.