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Finding the Fourth Proportional to 642,237, 886,288.12 and 351,842.18

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Solution

The fourth proportional to 642,237, 886,288.12 and 351,842.18 is: 485,542.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,237 : 886,288.12 = 351,842.18 : x
  2. Step 2: Convert to fraction form
    642,237/886,288.12 = 351,842.18/x
  3. Step 3: Cross multiply
    642,237x = 886,288.12 × 351,842.18
  4. Step 4: Simplify right side
    642,237x = 311,833,544,248.90
  5. Step 5: Solve for x
    x = 311,833,544,248.90/642,237
  6. Step 6: Final answer
    x = 485,542.79

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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.