Home / 1,240,239.90-1,711,682.51-781,346.78

Finding the Fourth Proportional to 1,240,239.90, 1,711,682.51 and 781,346.78

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Solution

The fourth proportional to 1,240,239.90, 1,711,682.51 and 781,346.78 is: 1,078,353.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240,239.90 : 1,711,682.51 = 781,346.78 : x
  2. Step 2: Convert to fraction form
    1,240,239.90/1,711,682.51 = 781,346.78/x
  3. Step 3: Cross multiply
    1,240,239.90x = 1,711,682.51 × 781,346.78
  4. Step 4: Simplify right side
    1,240,239.90x = 1,337,417,618,536.13
  5. Step 5: Solve for x
    x = 1,337,417,618,536.13/1,240,239.90
  6. Step 6: Final answer
    x = 1,078,353.97

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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.