Home / 1,138,407.90-1,707,611.85-428,595.18

Finding the Fourth Proportional to 1,138,407.90, 1,707,611.85 and 428,595.18

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Solution

The fourth proportional to 1,138,407.90, 1,707,611.85 and 428,595.18 is: 642,892.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138,407.90 : 1,707,611.85 = 428,595.18 : x
  2. Step 2: Convert to fraction form
    1,138,407.90/1,707,611.85 = 428,595.18/x
  3. Step 3: Cross multiply
    1,138,407.90x = 1,707,611.85 × 428,595.18
  4. Step 4: Simplify right side
    1,138,407.90x = 731,874,208,220.88
  5. Step 5: Solve for x
    x = 731,874,208,220.88/1,138,407.90
  6. Step 6: Final answer
    x = 642,892.77

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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.