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Finding the Fourth Proportional to 286,322.40, 429,532.20 and 86,641.20

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Solution

The fourth proportional to 286,322.40, 429,532.20 and 86,641.20 is: 129,976.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,322.40 : 429,532.20 = 86,641.20 : x
  2. Step 2: Convert to fraction form
    286,322.40/429,532.20 = 86,641.20/x
  3. Step 3: Cross multiply
    286,322.40x = 429,532.20 × 86,641.20
  4. Step 4: Simplify right side
    286,322.40x = 37,215,185,246.64
  5. Step 5: Solve for x
    x = 37,215,185,246.64/286,322.40
  6. Step 6: Final answer
    x = 129,976.51

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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.