Home / 782,142.30-1,078,798.68-717,818.79

Finding the Fourth Proportional to 782,142.30, 1,078,798.68 and 717,818.79

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Solution

The fourth proportional to 782,142.30, 1,078,798.68 and 717,818.79 is: 990,078.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    782,142.30 : 1,078,798.68 = 717,818.79 : x
  2. Step 2: Convert to fraction form
    782,142.30/1,078,798.68 = 717,818.79/x
  3. Step 3: Cross multiply
    782,142.30x = 1,078,798.68 × 717,818.79
  4. Step 4: Simplify right side
    782,142.30x = 774,381,963,131.20
  5. Step 5: Solve for x
    x = 774,381,963,131.20/782,142.30
  6. Step 6: Final answer
    x = 990,078.10

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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.