Home / 917,138.40-1,375,707.60-581,215.20

Finding the Fourth Proportional to 917,138.40, 1,375,707.60 and 581,215.20

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Solution

The fourth proportional to 917,138.40, 1,375,707.60 and 581,215.20 is: 871,822.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,138.40 : 1,375,707.60 = 581,215.20 : x
  2. Step 2: Convert to fraction form
    917,138.40/1,375,707.60 = 581,215.20/x
  3. Step 3: Cross multiply
    917,138.40x = 1,375,707.60 × 581,215.20
  4. Step 4: Simplify right side
    917,138.40x = 799,582,167,875.52
  5. Step 5: Solve for x
    x = 799,582,167,875.52/917,138.40
  6. Step 6: Final answer
    x = 871,822.80

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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.