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Finding the Fourth Proportional to 500,371.68, 690,620.04 and 319,041.84

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Solution

The fourth proportional to 500,371.68, 690,620.04 and 319,041.84 is: 440,346.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,371.68 : 690,620.04 = 319,041.84 : x
  2. Step 2: Convert to fraction form
    500,371.68/690,620.04 = 319,041.84/x
  3. Step 3: Cross multiply
    500,371.68x = 690,620.04 × 319,041.84
  4. Step 4: Simplify right side
    500,371.68x = 220,336,688,302.47
  5. Step 5: Solve for x
    x = 220,336,688,302.47/500,371.68
  6. Step 6: Final answer
    x = 440,346.04

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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.