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Finding the Fourth Proportional to 654,400.80, 981,601.20 and 402,458.40

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Solution

The fourth proportional to 654,400.80, 981,601.20 and 402,458.40 is: 603,687.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,400.80 : 981,601.20 = 402,458.40 : x
  2. Step 2: Convert to fraction form
    654,400.80/981,601.20 = 402,458.40/x
  3. Step 3: Cross multiply
    654,400.80x = 981,601.20 × 402,458.40
  4. Step 4: Simplify right side
    654,400.80x = 395,053,648,390.08
  5. Step 5: Solve for x
    x = 395,053,648,390.08/654,400.80
  6. Step 6: Final answer
    x = 603,687.60

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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.