Home / 991,416.64-1,487,121.90-281,445.16

Finding the Fourth Proportional to 991,416.64, 1,487,121.90 and 281,445.16

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Solution

The fourth proportional to 991,416.64, 1,487,121.90 and 281,445.16 is: 422,166.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,416.64 : 1,487,121.90 = 281,445.16 : x
  2. Step 2: Convert to fraction form
    991,416.64/1,487,121.90 = 281,445.16/x
  3. Step 3: Cross multiply
    991,416.64x = 1,487,121.90 × 281,445.16
  4. Step 4: Simplify right side
    991,416.64x = 418,543,261,085.00
  5. Step 5: Solve for x
    x = 418,543,261,085.00/991,416.64
  6. Step 6: Final answer
    x = 422,166.87

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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.