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Finding the Fourth Proportional to 519,018.92, 778,154.68 and 318,925.89

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Solution

The fourth proportional to 519,018.92, 778,154.68 and 318,925.89 is: 478,159.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,018.92 : 778,154.68 = 318,925.89 : x
  2. Step 2: Convert to fraction form
    519,018.92/778,154.68 = 318,925.89/x
  3. Step 3: Cross multiply
    519,018.92x = 778,154.68 × 318,925.89
  4. Step 4: Simplify right side
    519,018.92x = 248,173,673,876.67
  5. Step 5: Solve for x
    x = 248,173,673,876.67/519,018.92
  6. Step 6: Final answer
    x = 478,159.20

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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.