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Finding the Fourth Proportional to 286,570.40, 429,859.20 and 86,892.80

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Solution

The fourth proportional to 286,570.40, 429,859.20 and 86,892.80 is: 130,340.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,570.40 : 429,859.20 = 86,892.80 : x
  2. Step 2: Convert to fraction form
    286,570.40/429,859.20 = 86,892.80/x
  3. Step 3: Cross multiply
    286,570.40x = 429,859.20 × 86,892.80
  4. Step 4: Simplify right side
    286,570.40x = 37,351,669,493.76
  5. Step 5: Solve for x
    x = 37,351,669,493.76/286,570.40
  6. Step 6: Final answer
    x = 130,340.29

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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.