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Finding the Fourth Proportional to 519,319.70, 778,979.55 and 430,673.30

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Solution

The fourth proportional to 519,319.70, 778,979.55 and 430,673.30 is: 646,009.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,319.70 : 778,979.55 = 430,673.30 : x
  2. Step 2: Convert to fraction form
    519,319.70/778,979.55 = 430,673.30/x
  3. Step 3: Cross multiply
    519,319.70x = 778,979.55 × 430,673.30
  4. Step 4: Simplify right side
    519,319.70x = 335,485,693,431.02
  5. Step 5: Solve for x
    x = 335,485,693,431.02/519,319.70
  6. Step 6: Final answer
    x = 646,009.95

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Similar ratio
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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.