Home / 768,139.38-1,060,031.52-428,607.63

Finding the Fourth Proportional to 768,139.38, 1,060,031.52 and 428,607.63

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Solution

The fourth proportional to 768,139.38, 1,060,031.52 and 428,607.63 is: 591,478.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,139.38 : 1,060,031.52 = 428,607.63 : x
  2. Step 2: Convert to fraction form
    768,139.38/1,060,031.52 = 428,607.63/x
  3. Step 3: Cross multiply
    768,139.38x = 1,060,031.52 × 428,607.63
  4. Step 4: Simplify right side
    768,139.38x = 454,337,597,512.50
  5. Step 5: Solve for x
    x = 454,337,597,512.50/768,139.38
  6. Step 6: Final answer
    x = 591,478.07

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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.