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Finding the Fourth Proportional to 286,611.30, 429,807.60 and 86,865.30

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Solution

The fourth proportional to 286,611.30, 429,807.60 and 86,865.30 is: 130,264.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,611.30 : 429,807.60 = 86,865.30 : x
  2. Step 2: Convert to fraction form
    286,611.30/429,807.60 = 86,865.30/x
  3. Step 3: Cross multiply
    286,611.30x = 429,807.60 × 86,865.30
  4. Step 4: Simplify right side
    286,611.30x = 37,335,366,116.28
  5. Step 5: Solve for x
    x = 37,335,366,116.28/286,611.30
  6. Step 6: Final answer
    x = 130,264.81

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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.