Home / 991,139.40-1,486,765.50-281,111.28

Finding the Fourth Proportional to 991,139.40, 1,486,765.50 and 281,111.28

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Solution

The fourth proportional to 991,139.40, 1,486,765.50 and 281,111.28 is: 421,682.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,139.40 : 1,486,765.50 = 281,111.28 : x
  2. Step 2: Convert to fraction form
    991,139.40/1,486,765.50 = 281,111.28/x
  3. Step 3: Cross multiply
    991,139.40x = 1,486,765.50 × 281,111.28
  4. Step 4: Simplify right side
    991,139.40x = 417,946,552,764.84
  5. Step 5: Solve for x
    x = 417,946,552,764.84/991,139.40
  6. Step 6: Final answer
    x = 421,682.92

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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.