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Finding the Fourth Proportional to 478,301.70, 660,042.78 and 260,505.48

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Solution

The fourth proportional to 478,301.70, 660,042.78 and 260,505.48 is: 359,490.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,301.70 : 660,042.78 = 260,505.48 : x
  2. Step 2: Convert to fraction form
    478,301.70/660,042.78 = 260,505.48/x
  3. Step 3: Cross multiply
    478,301.70x = 660,042.78 × 260,505.48
  4. Step 4: Simplify right side
    478,301.70x = 171,944,761,224.43
  5. Step 5: Solve for x
    x = 171,944,761,224.43/478,301.70
  6. Step 6: Final answer
    x = 359,490.17

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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.