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Finding the Fourth Proportional to 318,897.72, 478,346.58 and 131,703.48

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Solution

The fourth proportional to 318,897.72, 478,346.58 and 131,703.48 is: 197,555.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,897.72 : 478,346.58 = 131,703.48 : x
  2. Step 2: Convert to fraction form
    318,897.72/478,346.58 = 131,703.48/x
  3. Step 3: Cross multiply
    318,897.72x = 478,346.58 × 131,703.48
  4. Step 4: Simplify right side
    318,897.72x = 62,999,909,232.10
  5. Step 5: Solve for x
    x = 62,999,909,232.10/318,897.72
  6. Step 6: Final answer
    x = 197,555.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.