Home / 670,679.39-1,006,019.09-389,999.81

Finding the Fourth Proportional to 670,679.39, 1,006,019.09 and 389,999.81

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Solution

The fourth proportional to 670,679.39, 1,006,019.09 and 389,999.81 is: 584,999.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,679.39 : 1,006,019.09 = 389,999.81 : x
  2. Step 2: Convert to fraction form
    670,679.39/1,006,019.09 = 389,999.81/x
  3. Step 3: Cross multiply
    670,679.39x = 1,006,019.09 × 389,999.81
  4. Step 4: Simplify right side
    670,679.39x = 392,347,255,983.92
  5. Step 5: Solve for x
    x = 392,347,255,983.92/670,679.39
  6. Step 6: Final answer
    x = 584,999.72

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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.