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Finding the Fourth Proportional to 519,017.92, 778,153.19 and 318,924.89

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Solution

The fourth proportional to 519,017.92, 778,153.19 and 318,924.89 is: 478,157.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,017.92 : 778,153.19 = 318,924.89 : x
  2. Step 2: Convert to fraction form
    519,017.92/778,153.19 = 318,924.89/x
  3. Step 3: Cross multiply
    519,017.92x = 778,153.19 × 318,924.89
  4. Step 4: Simplify right side
    519,017.92x = 248,172,417,956.58
  5. Step 5: Solve for x
    x = 248,172,417,956.58/519,017.92
  6. Step 6: Final answer
    x = 478,157.70

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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.