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Finding the Fourth Proportional to 480,695.86, 724,288.86 and 398,289.70

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Solution

The fourth proportional to 480,695.86, 724,288.86 and 398,289.70 is: 600,123.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,695.86 : 724,288.86 = 398,289.70 : x
  2. Step 2: Convert to fraction form
    480,695.86/724,288.86 = 398,289.70/x
  3. Step 3: Cross multiply
    480,695.86x = 724,288.86 × 398,289.70
  4. Step 4: Simplify right side
    480,695.86x = 288,476,790,771.29
  5. Step 5: Solve for x
    x = 288,476,790,771.29/480,695.86
  6. Step 6: Final answer
    x = 600,123.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.