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Finding the Fourth Proportional to 519,244.90, 778,867.35 and 318,915.70

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Solution

The fourth proportional to 519,244.90, 778,867.35 and 318,915.70 is: 478,373.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,244.90 : 778,867.35 = 318,915.70 : x
  2. Step 2: Convert to fraction form
    519,244.90/778,867.35 = 318,915.70/x
  3. Step 3: Cross multiply
    519,244.90x = 778,867.35 × 318,915.70
  4. Step 4: Simplify right side
    519,244.90x = 248,393,026,132.40
  5. Step 5: Solve for x
    x = 248,393,026,132.40/519,244.90
  6. Step 6: Final answer
    x = 478,373.55

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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.