Home / 642,238.80-963,358.20-430,731.60

Finding the Fourth Proportional to 642,238.80, 963,358.20 and 430,731.60

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Solution

The fourth proportional to 642,238.80, 963,358.20 and 430,731.60 is: 646,097.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,238.80 : 963,358.20 = 430,731.60 : x
  2. Step 2: Convert to fraction form
    642,238.80/963,358.20 = 430,731.60/x
  3. Step 3: Cross multiply
    642,238.80x = 963,358.20 × 430,731.60
  4. Step 4: Simplify right side
    642,238.80x = 414,948,818,859.12
  5. Step 5: Solve for x
    x = 414,948,818,859.12/642,238.80
  6. Step 6: Final answer
    x = 646,097.40

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Similar ratio
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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.