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Finding the Fourth Proportional to 576,784.60, 865,176.90 and 340,394.20

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Solution

The fourth proportional to 576,784.60, 865,176.90 and 340,394.20 is: 510,591.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,784.60 : 865,176.90 = 340,394.20 : x
  2. Step 2: Convert to fraction form
    576,784.60/865,176.90 = 340,394.20/x
  3. Step 3: Cross multiply
    576,784.60x = 865,176.90 × 340,394.20
  4. Step 4: Simplify right side
    576,784.60x = 294,501,198,733.98
  5. Step 5: Solve for x
    x = 294,501,198,733.98/576,784.60
  6. Step 6: Final answer
    x = 510,591.30

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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.