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Finding the Fourth Proportional to 280,616.67, 420,924.65 and 70,254.59

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Solution

The fourth proportional to 280,616.67, 420,924.65 and 70,254.59 is: 105,381.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,616.67 : 420,924.65 = 70,254.59 : x
  2. Step 2: Convert to fraction form
    280,616.67/420,924.65 = 70,254.59/x
  3. Step 3: Cross multiply
    280,616.67x = 420,924.65 × 70,254.59
  4. Step 4: Simplify right side
    280,616.67x = 29,571,886,250.75
  5. Step 5: Solve for x
    x = 29,571,886,250.75/280,616.67
  6. Step 6: Final answer
    x = 105,381.79

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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.