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Finding the Fourth Proportional to 662,672.68, 914,366.82 and 390,825.64

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Solution

The fourth proportional to 662,672.68, 914,366.82 and 390,825.64 is: 539,267.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,672.68 : 914,366.82 = 390,825.64 : x
  2. Step 2: Convert to fraction form
    662,672.68/914,366.82 = 390,825.64/x
  3. Step 3: Cross multiply
    662,672.68x = 914,366.82 × 390,825.64
  4. Step 4: Simplify right side
    662,672.68x = 357,357,997,621.27
  5. Step 5: Solve for x
    x = 357,357,997,621.27/662,672.68
  6. Step 6: Final answer
    x = 539,267.74

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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.