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Finding the Fourth Proportional to 478,995.60, 661,058.16 and 275,073.24

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Solution

The fourth proportional to 478,995.60, 661,058.16 and 275,073.24 is: 379,626.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,995.60 : 661,058.16 = 275,073.24 : x
  2. Step 2: Convert to fraction form
    478,995.60/661,058.16 = 275,073.24/x
  3. Step 3: Cross multiply
    478,995.60x = 661,058.16 × 275,073.24
  4. Step 4: Simplify right side
    478,995.60x = 181,839,409,899.64
  5. Step 5: Solve for x
    x = 181,839,409,899.64/478,995.60
  6. Step 6: Final answer
    x = 379,626.47

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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.