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Finding the Fourth Proportional to 718,406.76, 990,371.22 and 565,178.82

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Solution

The fourth proportional to 718,406.76, 990,371.22 and 565,178.82 is: 779,136.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,406.76 : 990,371.22 = 565,178.82 : x
  2. Step 2: Convert to fraction form
    718,406.76/990,371.22 = 565,178.82/x
  3. Step 3: Cross multiply
    718,406.76x = 990,371.22 × 565,178.82
  4. Step 4: Simplify right side
    718,406.76x = 559,736,837,481.56
  5. Step 5: Solve for x
    x = 559,736,837,481.56/718,406.76
  6. Step 6: Final answer
    x = 779,136.37

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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.