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Finding the Fourth Proportional to 478,953.54, 661,000.23 and 275,031.18

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Solution

The fourth proportional to 478,953.54, 661,000.23 and 275,031.18 is: 379,568.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,953.54 : 661,000.23 = 275,031.18 : x
  2. Step 2: Convert to fraction form
    478,953.54/661,000.23 = 275,031.18/x
  3. Step 3: Cross multiply
    478,953.54x = 661,000.23 × 275,031.18
  4. Step 4: Simplify right side
    478,953.54x = 181,795,673,237.17
  5. Step 5: Solve for x
    x = 181,795,673,237.17/478,953.54
  6. Step 6: Final answer
    x = 379,568.49

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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.