Home / 1,138,434.90-1,707,652.35-428,622.18

Finding the Fourth Proportional to 1,138,434.90, 1,707,652.35 and 428,622.18

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Solution

The fourth proportional to 1,138,434.90, 1,707,652.35 and 428,622.18 is: 642,933.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138,434.90 : 1,707,652.35 = 428,622.18 : x
  2. Step 2: Convert to fraction form
    1,138,434.90/1,707,652.35 = 428,622.18/x
  3. Step 3: Cross multiply
    1,138,434.90x = 1,707,652.35 × 428,622.18
  4. Step 4: Simplify right side
    1,138,434.90x = 731,937,672,939.12
  5. Step 5: Solve for x
    x = 731,937,672,939.12/1,138,434.90
  6. Step 6: Final answer
    x = 642,933.27

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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.