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Finding the Fourth Proportional to 280,618.17, 420,926.90 and 70,256.09

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Solution

The fourth proportional to 280,618.17, 420,926.90 and 70,256.09 is: 105,384.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,618.17 : 420,926.90 = 70,256.09 : x
  2. Step 2: Convert to fraction form
    280,618.17/420,926.90 = 70,256.09/x
  3. Step 3: Cross multiply
    280,618.17x = 420,926.90 × 70,256.09
  4. Step 4: Simplify right side
    280,618.17x = 29,572,675,713.91
  5. Step 5: Solve for x
    x = 29,572,675,713.91/280,618.17
  6. Step 6: Final answer
    x = 105,384.04

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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.