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Finding the Fourth Proportional to 286,771.10, 429,281.85 and 255,278.30

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Solution

The fourth proportional to 286,771.10, 429,281.85 and 255,278.30 is: 382,138.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,771.10 : 429,281.85 = 255,278.30 : x
  2. Step 2: Convert to fraction form
    286,771.10/429,281.85 = 255,278.30/x
  3. Step 3: Cross multiply
    286,771.10x = 429,281.85 × 255,278.30
  4. Step 4: Simplify right side
    286,771.10x = 109,586,340,888.86
  5. Step 5: Solve for x
    x = 109,586,340,888.86/286,771.10
  6. Step 6: Final answer
    x = 382,138.72

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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.