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Finding the Fourth Proportional to 281,391.18, 388,319.76 and 154,066.74

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Solution

The fourth proportional to 281,391.18, 388,319.76 and 154,066.74 is: 212,612.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,391.18 : 388,319.76 = 154,066.74 : x
  2. Step 2: Convert to fraction form
    281,391.18/388,319.76 = 154,066.74/x
  3. Step 3: Cross multiply
    281,391.18x = 388,319.76 × 154,066.74
  4. Step 4: Simplify right side
    281,391.18x = 59,827,159,500.78
  5. Step 5: Solve for x
    x = 59,827,159,500.78/281,391.18
  6. Step 6: Final answer
    x = 212,612.06

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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.