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Finding the Fourth Proportional to 676,825.40, 934,118.52 and 390,289.52

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Solution

The fourth proportional to 676,825.40, 934,118.52 and 390,289.52 is: 538,656.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,825.40 : 934,118.52 = 390,289.52 : x
  2. Step 2: Convert to fraction form
    676,825.40/934,118.52 = 390,289.52/x
  3. Step 3: Cross multiply
    676,825.40x = 934,118.52 × 390,289.52
  4. Step 4: Simplify right side
    676,825.40x = 364,576,668,793.91
  5. Step 5: Solve for x
    x = 364,576,668,793.91/676,825.40
  6. Step 6: Final answer
    x = 538,656.90

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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.