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Finding the Fourth Proportional to 280,315.72, 420,473.58 and 69,953.66

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Solution

The fourth proportional to 280,315.72, 420,473.58 and 69,953.66 is: 104,930.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,315.72 : 420,473.58 = 69,953.66 : x
  2. Step 2: Convert to fraction form
    280,315.72/420,473.58 = 69,953.66/x
  3. Step 3: Cross multiply
    280,315.72x = 420,473.58 × 69,953.66
  4. Step 4: Simplify right side
    280,315.72x = 29,413,665,854.30
  5. Step 5: Solve for x
    x = 29,413,665,854.30/280,315.72
  6. Step 6: Final answer
    x = 104,930.49

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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.