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Finding the Fourth Proportional to 502,428.87, 693,075.02 and 318,330.63

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Solution

The fourth proportional to 502,428.87, 693,075.02 and 318,330.63 is: 439,120.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,428.87 : 693,075.02 = 318,330.63 : x
  2. Step 2: Convert to fraction form
    502,428.87/693,075.02 = 318,330.63/x
  3. Step 3: Cross multiply
    502,428.87x = 693,075.02 × 318,330.63
  4. Step 4: Simplify right side
    502,428.87x = 220,627,006,162.21
  5. Step 5: Solve for x
    x = 220,627,006,162.21/502,428.87
  6. Step 6: Final answer
    x = 439,120.88

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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.