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Finding the Fourth Proportional to 477,225.60, 715,838.40 and 399,076.80

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Solution

The fourth proportional to 477,225.60, 715,838.40 and 399,076.80 is: 598,615.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    477,225.60 : 715,838.40 = 399,076.80 : x
  2. Step 2: Convert to fraction form
    477,225.60/715,838.40 = 399,076.80/x
  3. Step 3: Cross multiply
    477,225.60x = 715,838.40 × 399,076.80
  4. Step 4: Simplify right side
    477,225.60x = 285,674,497,989.12
  5. Step 5: Solve for x
    x = 285,674,497,989.12/477,225.60
  6. Step 6: Final answer
    x = 598,615.20

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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.