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Finding the Fourth Proportional to 286,578.40, 429,871.20 and 86,900.80

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Solution

The fourth proportional to 286,578.40, 429,871.20 and 86,900.80 is: 130,352.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,578.40 : 429,871.20 = 86,900.80 : x
  2. Step 2: Convert to fraction form
    286,578.40/429,871.20 = 86,900.80/x
  3. Step 3: Cross multiply
    286,578.40x = 429,871.20 × 86,900.80
  4. Step 4: Simplify right side
    286,578.40x = 37,356,151,176.96
  5. Step 5: Solve for x
    x = 37,356,151,176.96/286,578.40
  6. Step 6: Final answer
    x = 130,352.29

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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.