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Finding the Fourth Proportional to 281,281.35, 388,167.62 and 153,955.83

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Solution

The fourth proportional to 281,281.35, 388,167.62 and 153,955.83 is: 212,458.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,281.35 : 388,167.62 = 153,955.83 : x
  2. Step 2: Convert to fraction form
    281,281.35/388,167.62 = 153,955.83/x
  3. Step 3: Cross multiply
    281,281.35x = 388,167.62 × 153,955.83
  4. Step 4: Simplify right side
    281,281.35x = 59,760,667,346.45
  5. Step 5: Solve for x
    x = 59,760,667,346.45/281,281.35
  6. Step 6: Final answer
    x = 212,458.69

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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.