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Finding the Fourth Proportional to 286,086.40, 429,129.60 and 160,115.20

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Solution

The fourth proportional to 286,086.40, 429,129.60 and 160,115.20 is: 240,172.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,086.40 : 429,129.60 = 160,115.20 : x
  2. Step 2: Convert to fraction form
    286,086.40/429,129.60 = 160,115.20/x
  3. Step 3: Cross multiply
    286,086.40x = 429,129.60 × 160,115.20
  4. Step 4: Simplify right side
    286,086.40x = 68,710,171,729.92
  5. Step 5: Solve for x
    x = 68,710,171,729.92/286,086.40
  6. Step 6: Final answer
    x = 240,172.80

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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.