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Finding the Fourth Proportional to 287,184.54, 430,776.87 and 129,228.45

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Solution

The fourth proportional to 287,184.54, 430,776.87 and 129,228.45 is: 193,842.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,184.54 : 430,776.87 = 129,228.45 : x
  2. Step 2: Convert to fraction form
    287,184.54/430,776.87 = 129,228.45/x
  3. Step 3: Cross multiply
    287,184.54x = 430,776.87 × 129,228.45
  4. Step 4: Simplify right side
    287,184.54x = 55,668,627,205.95
  5. Step 5: Solve for x
    x = 55,668,627,205.95/287,184.54
  6. Step 6: Final answer
    x = 193,842.70

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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.