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Finding the Fourth Proportional to 861,347.75, 1,188,659.90 and 479,464.74

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Solution

The fourth proportional to 861,347.75, 1,188,659.90 and 479,464.74 is: 661,661.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,347.75 : 1,188,659.90 = 479,464.74 : x
  2. Step 2: Convert to fraction form
    861,347.75/1,188,659.90 = 479,464.74/x
  3. Step 3: Cross multiply
    861,347.75x = 1,188,659.90 × 479,464.74
  4. Step 4: Simplify right side
    861,347.75x = 569,920,509,901.93
  5. Step 5: Solve for x
    x = 569,920,509,901.93/861,347.75
  6. Step 6: Final answer
    x = 661,661.34

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Double scale
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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.