Home / 718,640.64-991,769.40-412,812.72

Finding the Fourth Proportional to 718,640.64, 991,769.40 and 412,812.72

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Solution

The fourth proportional to 718,640.64, 991,769.40 and 412,812.72 is: 569,707.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,640.64 : 991,769.40 = 412,812.72 : x
  2. Step 2: Convert to fraction form
    718,640.64/991,769.40 = 412,812.72/x
  3. Step 3: Cross multiply
    718,640.64x = 991,769.40 × 412,812.72
  4. Step 4: Simplify right side
    718,640.64x = 409,415,023,626.77
  5. Step 5: Solve for x
    x = 409,415,023,626.77/718,640.64
  6. Step 6: Final answer
    x = 569,707.59

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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.