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Finding the Fourth Proportional to 286,580.40, 429,874.20 and 86,902.80

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Solution

The fourth proportional to 286,580.40, 429,874.20 and 86,902.80 is: 130,355.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,580.40 : 429,874.20 = 86,902.80 : x
  2. Step 2: Convert to fraction form
    286,580.40/429,874.20 = 86,902.80/x
  3. Step 3: Cross multiply
    286,580.40x = 429,874.20 × 86,902.80
  4. Step 4: Simplify right side
    286,580.40x = 37,357,271,627.76
  5. Step 5: Solve for x
    x = 37,357,271,627.76/286,580.40
  6. Step 6: Final answer
    x = 130,355.29

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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.