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Finding the Fourth Proportional to 644,718.69, 889,716.08 and 403,142.67

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Solution

The fourth proportional to 644,718.69, 889,716.08 and 403,142.67 is: 556,339.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,718.69 : 889,716.08 = 403,142.67 : x
  2. Step 2: Convert to fraction form
    644,718.69/889,716.08 = 403,142.67/x
  3. Step 3: Cross multiply
    644,718.69x = 889,716.08 × 403,142.67
  4. Step 4: Simplify right side
    644,718.69x = 358,682,517,040.99
  5. Step 5: Solve for x
    x = 358,682,517,040.99/644,718.69
  6. Step 6: Final answer
    x = 556,339.57

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Double scale
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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.