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Finding the Fourth Proportional to 261,047.20, 391,570.80 and 245,495.20

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Solution

The fourth proportional to 261,047.20, 391,570.80 and 245,495.20 is: 368,242.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,047.20 : 391,570.80 = 245,495.20 : x
  2. Step 2: Convert to fraction form
    261,047.20/391,570.80 = 245,495.20/x
  3. Step 3: Cross multiply
    261,047.20x = 391,570.80 × 245,495.20
  4. Step 4: Simplify right side
    261,047.20x = 96,128,751,860.16
  5. Step 5: Solve for x
    x = 96,128,751,860.16/261,047.20
  6. Step 6: Final answer
    x = 368,242.80

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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.