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Finding the Fourth Proportional to 390,851.20, 586,276.80 and 367,231.60

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Solution

The fourth proportional to 390,851.20, 586,276.80 and 367,231.60 is: 550,847.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,851.20 : 586,276.80 = 367,231.60 : x
  2. Step 2: Convert to fraction form
    390,851.20/586,276.80 = 367,231.60/x
  3. Step 3: Cross multiply
    390,851.20x = 586,276.80 × 367,231.60
  4. Step 4: Simplify right side
    390,851.20x = 215,299,367,306.88
  5. Step 5: Solve for x
    x = 215,299,367,306.88/390,851.20
  6. Step 6: Final answer
    x = 550,847.40

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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.