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Finding the Fourth Proportional to 891,961,335.80, 1,337,942,003.70 and 708,295,326.20

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Solution

The fourth proportional to 891,961,335.80, 1,337,942,003.70 and 708,295,326.20 is: 1,062,442,989.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,961,335.80 : 1,337,942,003.70 = 708,295,326.20 : x
  2. Step 2: Convert to fraction form
    891,961,335.80/1,337,942,003.70 = 708,295,326.20/x
  3. Step 3: Cross multiply
    891,961,335.80x = 1,337,942,003.70 × 708,295,326.20
  4. Step 4: Simplify right side
    891,961,335.80x = 947,658,067,947,373,184
  5. Step 5: Solve for x
    x = 947,658,067,947,373,184/891,961,335.80
  6. Step 6: Final answer
    x = 1,062,442,989.30

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.