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Finding the Fourth Proportional to 708,275.30, 977,391.33 and 385,978.46

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Solution

The fourth proportional to 708,275.30, 977,391.33 and 385,978.46 is: 532,634.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,275.30 : 977,391.33 = 385,978.46 : x
  2. Step 2: Convert to fraction form
    708,275.30/977,391.33 = 385,978.46/x
  3. Step 3: Cross multiply
    708,275.30x = 977,391.33 × 385,978.46
  4. Step 4: Simplify right side
    708,275.30x = 377,251,995,483.80
  5. Step 5: Solve for x
    x = 377,251,995,483.80/708,275.30
  6. Step 6: Final answer
    x = 532,634.69

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1.5x scale

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.