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Finding the Fourth Proportional to 287,387.16, 396,686.20 and 185,415.48

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Solution

The fourth proportional to 287,387.16, 396,686.20 and 185,415.48 is: 255,932.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,387.16 : 396,686.20 = 185,415.48 : x
  2. Step 2: Convert to fraction form
    287,387.16/396,686.20 = 185,415.48/x
  3. Step 3: Cross multiply
    287,387.16x = 396,686.20 × 185,415.48
  4. Step 4: Simplify right side
    287,387.16x = 73,551,762,182.38
  5. Step 5: Solve for x
    x = 73,551,762,182.38/287,387.16
  6. Step 6: Final answer
    x = 255,932.67

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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.