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Finding the Fourth Proportional to 347,097.60, 478,987.20 and 188,121.60

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Solution

The fourth proportional to 347,097.60, 478,987.20 and 188,121.60 is: 259,603.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,097.60 : 478,987.20 = 188,121.60 : x
  2. Step 2: Convert to fraction form
    347,097.60/478,987.20 = 188,121.60/x
  3. Step 3: Cross multiply
    347,097.60x = 478,987.20 × 188,121.60
  4. Step 4: Simplify right side
    347,097.60x = 90,107,838,443.52
  5. Step 5: Solve for x
    x = 90,107,838,443.52/347,097.60
  6. Step 6: Final answer
    x = 259,603.75

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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.