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Finding the Fourth Proportional to 718,152.78, 989,708.31 and 536,544.30

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Solution

The fourth proportional to 718,152.78, 989,708.31 and 536,544.30 is: 739,428.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,152.78 : 989,708.31 = 536,544.30 : x
  2. Step 2: Convert to fraction form
    718,152.78/989,708.31 = 536,544.30/x
  3. Step 3: Cross multiply
    718,152.78x = 989,708.31 × 536,544.30
  4. Step 4: Simplify right side
    718,152.78x = 531,022,352,393.13
  5. Step 5: Solve for x
    x = 531,022,352,393.13/718,152.78
  6. Step 6: Final answer
    x = 739,428.11

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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.