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Finding the Fourth Proportional to 288,613.70, 398,413.35 and 220,633.52

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Solution

The fourth proportional to 288,613.70, 398,413.35 and 220,633.52 is: 304,570.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,613.70 : 398,413.35 = 220,633.52 : x
  2. Step 2: Convert to fraction form
    288,613.70/398,413.35 = 220,633.52/x
  3. Step 3: Cross multiply
    288,613.70x = 398,413.35 × 220,633.52
  4. Step 4: Simplify right side
    288,613.70x = 87,903,339,825.49
  5. Step 5: Solve for x
    x = 87,903,339,825.49/288,613.70
  6. Step 6: Final answer
    x = 304,570.92

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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.