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Finding the Fourth Proportional to 479,436.51, 661,638.27 and 261,657.10

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Solution

The fourth proportional to 479,436.51, 661,638.27 and 261,657.10 is: 361,095.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,436.51 : 661,638.27 = 261,657.10 : x
  2. Step 2: Convert to fraction form
    479,436.51/661,638.27 = 261,657.10/x
  3. Step 3: Cross multiply
    479,436.51x = 661,638.27 × 261,657.10
  4. Step 4: Simplify right side
    479,436.51x = 173,122,350,977.22
  5. Step 5: Solve for x
    x = 173,122,350,977.22/479,436.51
  6. Step 6: Final answer
    x = 361,095.47

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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.