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Finding the Fourth Proportional to 717,259.78, 989,743.24 and 407,063.59

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Solution

The fourth proportional to 717,259.78, 989,743.24 and 407,063.59 is: 561,705.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,259.78 : 989,743.24 = 407,063.59 : x
  2. Step 2: Convert to fraction form
    717,259.78/989,743.24 = 407,063.59/x
  3. Step 3: Cross multiply
    717,259.78x = 989,743.24 × 407,063.59
  4. Step 4: Simplify right side
    717,259.78x = 402,888,436,452.63
  5. Step 5: Solve for x
    x = 402,888,436,452.63/717,259.78
  6. Step 6: Final answer
    x = 561,705.04

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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.