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Finding the Fourth Proportional to 708,277, 977,422.28 and 390,325

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Solution

The fourth proportional to 708,277, 977,422.28 and 390,325 is: 538,648.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,277 : 977,422.28 = 390,325 : x
  2. Step 2: Convert to fraction form
    708,277/977,422.28 = 390,325/x
  3. Step 3: Cross multiply
    708,277x = 977,422.28 × 390,325
  4. Step 4: Simplify right side
    708,277x = 381,512,351,441
  5. Step 5: Solve for x
    x = 381,512,351,441/708,277
  6. Step 6: Final answer
    x = 538,648.51

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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.