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Finding the Fourth Proportional to 519,078.72, 778,579.20 and 145,130.88

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Solution

The fourth proportional to 519,078.72, 778,579.20 and 145,130.88 is: 217,685.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,078.72 : 778,579.20 = 145,130.88 : x
  2. Step 2: Convert to fraction form
    519,078.72/778,579.20 = 145,130.88/x
  3. Step 3: Cross multiply
    519,078.72x = 778,579.20 × 145,130.88
  4. Step 4: Simplify right side
    519,078.72x = 112,995,884,445.70
  5. Step 5: Solve for x
    x = 112,995,884,445.70/519,078.72
  6. Step 6: Final answer
    x = 217,685.45

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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.