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Finding the Fourth Proportional to 318,698.20, 478,047.30 and 176,980.60

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Solution

The fourth proportional to 318,698.20, 478,047.30 and 176,980.60 is: 265,470.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,698.20 : 478,047.30 = 176,980.60 : x
  2. Step 2: Convert to fraction form
    318,698.20/478,047.30 = 176,980.60/x
  3. Step 3: Cross multiply
    318,698.20x = 478,047.30 × 176,980.60
  4. Step 4: Simplify right side
    318,698.20x = 84,605,097,982.38
  5. Step 5: Solve for x
    x = 84,605,097,982.38/318,698.20
  6. Step 6: Final answer
    x = 265,470.90

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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.