Home / 432,785.20-649,177.80-426,880.30

Finding the Fourth Proportional to 432,785.20, 649,177.80 and 426,880.30

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Solution

The fourth proportional to 432,785.20, 649,177.80 and 426,880.30 is: 640,320.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,785.20 : 649,177.80 = 426,880.30 : x
  2. Step 2: Convert to fraction form
    432,785.20/649,177.80 = 426,880.30/x
  3. Step 3: Cross multiply
    432,785.20x = 649,177.80 × 426,880.30
  4. Step 4: Simplify right side
    432,785.20x = 277,121,214,017.34
  5. Step 5: Solve for x
    x = 277,121,214,017.34/432,785.20
  6. Step 6: Final answer
    x = 640,320.45

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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.