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Finding the Fourth Proportional to 679,807.60, 1,019,711.40 and 364,879.60

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Solution

The fourth proportional to 679,807.60, 1,019,711.40 and 364,879.60 is: 547,319.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,807.60 : 1,019,711.40 = 364,879.60 : x
  2. Step 2: Convert to fraction form
    679,807.60/1,019,711.40 = 364,879.60/x
  3. Step 3: Cross multiply
    679,807.60x = 1,019,711.40 × 364,879.60
  4. Step 4: Simplify right side
    679,807.60x = 372,071,887,747.44
  5. Step 5: Solve for x
    x = 372,071,887,747.44/679,807.60
  6. Step 6: Final answer
    x = 547,319.40

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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.