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Finding the Fourth Proportional to 1,250,398.72, 1,724,915.37 and 790,739.15

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Solution

The fourth proportional to 1,250,398.72, 1,724,915.37 and 790,739.15 is: 1,090,818.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,250,398.72 : 1,724,915.37 = 790,739.15 : x
  2. Step 2: Convert to fraction form
    1,250,398.72/1,724,915.37 = 790,739.15/x
  3. Step 3: Cross multiply
    1,250,398.72x = 1,724,915.37 × 790,739.15
  4. Step 4: Simplify right side
    1,250,398.72x = 1,363,958,110,530.46
  5. Step 5: Solve for x
    x = 1,363,958,110,530.46/1,250,398.72
  6. Step 6: Final answer
    x = 1,090,818.55

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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.