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Finding the Fourth Proportional to 644,763.65, 889,733.03 and 358,266.65

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Solution

The fourth proportional to 644,763.65, 889,733.03 and 358,266.65 is: 494,385.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,763.65 : 889,733.03 = 358,266.65 : x
  2. Step 2: Convert to fraction form
    644,763.65/889,733.03 = 358,266.65/x
  3. Step 3: Cross multiply
    644,763.65x = 889,733.03 × 358,266.65
  4. Step 4: Simplify right side
    644,763.65x = 318,761,665,812.45
  5. Step 5: Solve for x
    x = 318,761,665,812.45/644,763.65
  6. Step 6: Final answer
    x = 494,385.30

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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.