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Finding the Fourth Proportional to 423,968.40, 635,879.70 and 157,591.80

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Solution

The fourth proportional to 423,968.40, 635,879.70 and 157,591.80 is: 236,360.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,968.40 : 635,879.70 = 157,591.80 : x
  2. Step 2: Convert to fraction form
    423,968.40/635,879.70 = 157,591.80/x
  3. Step 3: Cross multiply
    423,968.40x = 635,879.70 × 157,591.80
  4. Step 4: Simplify right side
    423,968.40x = 100,209,426,506.46
  5. Step 5: Solve for x
    x = 100,209,426,506.46/423,968.40
  6. Step 6: Final answer
    x = 236,360.60

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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.