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Finding the Fourth Proportional to 519,319.60, 778,979.40 and 519,319.60

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Solution

The fourth proportional to 519,319.60, 778,979.40 and 519,319.60 is: 778,979.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,319.60 : 778,979.40 = 519,319.60 : x
  2. Step 2: Convert to fraction form
    519,319.60/778,979.40 = 519,319.60/x
  3. Step 3: Cross multiply
    519,319.60x = 778,979.40 × 519,319.60
  4. Step 4: Simplify right side
    519,319.60x = 404,539,270,416.24
  5. Step 5: Solve for x
    x = 404,539,270,416.24/519,319.60
  6. Step 6: Final answer
    x = 778,979.40

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Double scale
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Similar ratio
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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.