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Finding the Fourth Proportional to 803,145.68, 1,108,365 and 445,442

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Solution

The fourth proportional to 803,145.68, 1,108,365 and 445,442 is: 614,723.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    803,145.68 : 1,108,365 = 445,442 : x
  2. Step 2: Convert to fraction form
    803,145.68/1,108,365 = 445,442/x
  3. Step 3: Cross multiply
    803,145.68x = 1,108,365 × 445,442
  4. Step 4: Simplify right side
    803,145.68x = 493,712,322,330
  5. Step 5: Solve for x
    x = 493,712,322,330/803,145.68
  6. Step 6: Final answer
    x = 614,723.25

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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.