Home / 1,240,138.20-1,860,207.30-814,985.40

Finding the Fourth Proportional to 1,240,138.20, 1,860,207.30 and 814,985.40

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Solution

The fourth proportional to 1,240,138.20, 1,860,207.30 and 814,985.40 is: 1,222,478.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240,138.20 : 1,860,207.30 = 814,985.40 : x
  2. Step 2: Convert to fraction form
    1,240,138.20/1,860,207.30 = 814,985.40/x
  3. Step 3: Cross multiply
    1,240,138.20x = 1,860,207.30 × 814,985.40
  4. Step 4: Simplify right side
    1,240,138.20x = 1,516,041,790,473.42
  5. Step 5: Solve for x
    x = 1,516,041,790,473.42/1,240,138.20
  6. Step 6: Final answer
    x = 1,222,478.10

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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.