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Finding the Fourth Proportional to 280,686.16, 421,134 and 168,446.89

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Solution

The fourth proportional to 280,686.16, 421,134 and 168,446.89 is: 252,733.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,686.16 : 421,134 = 168,446.89 : x
  2. Step 2: Convert to fraction form
    280,686.16/421,134 = 168,446.89/x
  3. Step 3: Cross multiply
    280,686.16x = 421,134 × 168,446.89
  4. Step 4: Simplify right side
    280,686.16x = 70,938,712,573.26
  5. Step 5: Solve for x
    x = 70,938,712,573.26/280,686.16
  6. Step 6: Final answer
    x = 252,733.20

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1.5x scale

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.