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Finding the Fourth Proportional to 280,000.90, 420,001.35 and 264,837.70

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Solution

The fourth proportional to 280,000.90, 420,001.35 and 264,837.70 is: 397,256.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,000.90 : 420,001.35 = 264,837.70 : x
  2. Step 2: Convert to fraction form
    280,000.90/420,001.35 = 264,837.70/x
  3. Step 3: Cross multiply
    280,000.90x = 420,001.35 × 264,837.70
  4. Step 4: Simplify right side
    280,000.90x = 111,232,191,530.90
  5. Step 5: Solve for x
    x = 111,232,191,530.90/280,000.90
  6. Step 6: Final answer
    x = 397,256.55

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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.