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Finding the Fourth Proportional to 281,549.80, 388,445.70 and 172,613.80

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Solution

The fourth proportional to 281,549.80, 388,445.70 and 172,613.80 is: 238,150.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,549.80 : 388,445.70 = 172,613.80 : x
  2. Step 2: Convert to fraction form
    281,549.80/388,445.70 = 172,613.80/x
  3. Step 3: Cross multiply
    281,549.80x = 388,445.70 × 172,613.80
  4. Step 4: Simplify right side
    281,549.80x = 67,051,088,370.66
  5. Step 5: Solve for x
    x = 67,051,088,370.66/281,549.80
  6. Step 6: Final answer
    x = 238,150.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.