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Finding the Fourth Proportional to 431,223.20, 648,001.20 and 379,901.60

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Solution

The fourth proportional to 431,223.20, 648,001.20 and 379,901.60 is: 570,879.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,223.20 : 648,001.20 = 379,901.60 : x
  2. Step 2: Convert to fraction form
    431,223.20/648,001.20 = 379,901.60/x
  3. Step 3: Cross multiply
    431,223.20x = 648,001.20 × 379,901.60
  4. Step 4: Simplify right side
    431,223.20x = 246,176,692,681.92
  5. Step 5: Solve for x
    x = 246,176,692,681.92/431,223.20
  6. Step 6: Final answer
    x = 570,879.98

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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.