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Finding the Fourth Proportional to 280,314.72, 420,472.08 and 69,952.66

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Solution

The fourth proportional to 280,314.72, 420,472.08 and 69,952.66 is: 104,928.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,314.72 : 420,472.08 = 69,952.66 : x
  2. Step 2: Convert to fraction form
    280,314.72/420,472.08 = 69,952.66/x
  3. Step 3: Cross multiply
    280,314.72x = 420,472.08 × 69,952.66
  4. Step 4: Simplify right side
    280,314.72x = 29,413,139,400.55
  5. Step 5: Solve for x
    x = 29,413,139,400.55/280,314.72
  6. Step 6: Final answer
    x = 104,928.99

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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.