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Finding the Fourth Proportional to 313,218.16, 432,241.32 and 169,978.20

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Solution

The fourth proportional to 313,218.16, 432,241.32 and 169,978.20 is: 234,570.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,218.16 : 432,241.32 = 169,978.20 : x
  2. Step 2: Convert to fraction form
    313,218.16/432,241.32 = 169,978.20/x
  3. Step 3: Cross multiply
    313,218.16x = 432,241.32 × 169,978.20
  4. Step 4: Simplify right side
    313,218.16x = 73,471,601,539.22
  5. Step 5: Solve for x
    x = 73,471,601,539.22/313,218.16
  6. Step 6: Final answer
    x = 234,570.06

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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.