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Finding the Fourth Proportional to 654,066.60, 902,632.39 and 395,990.88

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Solution

The fourth proportional to 654,066.60, 902,632.39 and 395,990.88 is: 546,479.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,066.60 : 902,632.39 = 395,990.88 : x
  2. Step 2: Convert to fraction form
    654,066.60/902,632.39 = 395,990.88/x
  3. Step 3: Cross multiply
    654,066.60x = 902,632.39 × 395,990.88
  4. Step 4: Simplify right side
    654,066.60x = 357,434,194,432.60
  5. Step 5: Solve for x
    x = 357,434,194,432.60/654,066.60
  6. Step 6: Final answer
    x = 546,479.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.