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Finding the Fourth Proportional to 719,064.86, 992,308.34 and 396,774.70

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Solution

The fourth proportional to 719,064.86, 992,308.34 and 396,774.70 is: 547,548.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,064.86 : 992,308.34 = 396,774.70 : x
  2. Step 2: Convert to fraction form
    719,064.86/992,308.34 = 396,774.70/x
  3. Step 3: Cross multiply
    719,064.86x = 992,308.34 × 396,774.70
  4. Step 4: Simplify right side
    719,064.86x = 393,722,843,911.00
  5. Step 5: Solve for x
    x = 393,722,843,911.00/719,064.86
  6. Step 6: Final answer
    x = 547,548.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.