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Finding the Fourth Proportional to 286,520.40, 429,780.60 and 86,830.90

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Solution

The fourth proportional to 286,520.40, 429,780.60 and 86,830.90 is: 130,246.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,520.40 : 429,780.60 = 86,830.90 : x
  2. Step 2: Convert to fraction form
    286,520.40/429,780.60 = 86,830.90/x
  3. Step 3: Cross multiply
    286,520.40x = 429,780.60 × 86,830.90
  4. Step 4: Simplify right side
    286,520.40x = 37,318,236,300.54
  5. Step 5: Solve for x
    x = 37,318,236,300.54/286,520.40
  6. Step 6: Final answer
    x = 130,246.35

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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.