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Finding the Fourth Proportional to 390,401.60, 585,141.60 and 165,761.60

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Solution

The fourth proportional to 390,401.60, 585,141.60 and 165,761.60 is: 248,446.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,401.60 : 585,141.60 = 165,761.60 : x
  2. Step 2: Convert to fraction form
    390,401.60/585,141.60 = 165,761.60/x
  3. Step 3: Cross multiply
    390,401.60x = 585,141.60 × 165,761.60
  4. Step 4: Simplify right side
    390,401.60x = 96,994,007,842.56
  5. Step 5: Solve for x
    x = 96,994,007,842.56/390,401.60
  6. Step 6: Final answer
    x = 248,446.75

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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.