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Finding the Fourth Proportional to 478,556.09, 660,436.40 and 263,695.89

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Solution

The fourth proportional to 478,556.09, 660,436.40 and 263,695.89 is: 363,916.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,556.09 : 660,436.40 = 263,695.89 : x
  2. Step 2: Convert to fraction form
    478,556.09/660,436.40 = 263,695.89/x
  3. Step 3: Cross multiply
    478,556.09x = 660,436.40 × 263,695.89
  4. Step 4: Simplify right side
    478,556.09x = 174,154,364,286.40
  5. Step 5: Solve for x
    x = 174,154,364,286.40/478,556.09
  6. Step 6: Final answer
    x = 363,916.31

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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.