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Finding the Fourth Proportional to 318,924.72, 478,404.54 and 129,356.94

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Solution

The fourth proportional to 318,924.72, 478,404.54 and 129,356.94 is: 194,042.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,924.72 : 478,404.54 = 129,356.94 : x
  2. Step 2: Convert to fraction form
    318,924.72/478,404.54 = 129,356.94/x
  3. Step 3: Cross multiply
    318,924.72x = 478,404.54 × 129,356.94
  4. Step 4: Simplify right side
    318,924.72x = 61,884,947,376.51
  5. Step 5: Solve for x
    x = 61,884,947,376.51/318,924.72
  6. Step 6: Final answer
    x = 194,042.49

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1.5x scale

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.