Home / 991,128.40-1,486,748.92-281,100.24

Finding the Fourth Proportional to 991,128.40, 1,486,748.92 and 281,100.24

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Solution

The fourth proportional to 991,128.40, 1,486,748.92 and 281,100.24 is: 421,666.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,128.40 : 1,486,748.92 = 281,100.24 : x
  2. Step 2: Convert to fraction form
    991,128.40/1,486,748.92 = 281,100.24/x
  3. Step 3: Cross multiply
    991,128.40x = 1,486,748.92 × 281,100.24
  4. Step 4: Simplify right side
    991,128.40x = 417,925,478,231.74
  5. Step 5: Solve for x
    x = 417,925,478,231.74/991,128.40
  6. Step 6: Final answer
    x = 421,666.33

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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.