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Finding the Fourth Proportional to 281,548.80, 388,444.32 and 172,612.80

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Solution

The fourth proportional to 281,548.80, 388,444.32 and 172,612.80 is: 238,148.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,548.80 : 388,444.32 = 172,612.80 : x
  2. Step 2: Convert to fraction form
    281,548.80/388,444.32 = 172,612.80/x
  3. Step 3: Cross multiply
    281,548.80x = 388,444.32 × 172,612.80
  4. Step 4: Simplify right side
    281,548.80x = 67,050,461,719.30
  5. Step 5: Solve for x
    x = 67,050,461,719.30/281,548.80
  6. Step 6: Final answer
    x = 238,148.63

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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.