Home / 280,545.81-387,147.24-153,221.91

Finding the Fourth Proportional to 280,545.81, 387,147.24 and 153,221.91

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Solution

The fourth proportional to 280,545.81, 387,147.24 and 153,221.91 is: 211,442.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,545.81 : 387,147.24 = 153,221.91 : x
  2. Step 2: Convert to fraction form
    280,545.81/387,147.24 = 153,221.91/x
  3. Step 3: Cross multiply
    280,545.81x = 387,147.24 × 153,221.91
  4. Step 4: Simplify right side
    280,545.81x = 59,319,439,564.03
  5. Step 5: Solve for x
    x = 59,319,439,564.03/280,545.81
  6. Step 6: Final answer
    x = 211,442.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.