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Finding the Fourth Proportional to 479,372.68, 661,799.46 and 288,433

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Solution

The fourth proportional to 479,372.68, 661,799.46 and 288,433 is: 398,197.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,372.68 : 661,799.46 = 288,433 : x
  2. Step 2: Convert to fraction form
    479,372.68/661,799.46 = 288,433/x
  3. Step 3: Cross multiply
    479,372.68x = 661,799.46 × 288,433
  4. Step 4: Simplify right side
    479,372.68x = 190,884,803,646.18
  5. Step 5: Solve for x
    x = 190,884,803,646.18/479,372.68
  6. Step 6: Final answer
    x = 398,197.08

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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.