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Finding the Fourth Proportional to 716,006.25, 988,054.79 and 393,729.93

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Solution

The fourth proportional to 716,006.25, 988,054.79 and 393,729.93 is: 543,328.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,006.25 : 988,054.79 = 393,729.93 : x
  2. Step 2: Convert to fraction form
    716,006.25/988,054.79 = 393,729.93/x
  3. Step 3: Cross multiply
    716,006.25x = 988,054.79 × 393,729.93
  4. Step 4: Simplify right side
    716,006.25x = 389,026,743,302.87
  5. Step 5: Solve for x
    x = 389,026,743,302.87/716,006.25
  6. Step 6: Final answer
    x = 543,328.70

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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.