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Finding the Fourth Proportional to 978,927.21, 1,350,987.93 and 543,366.72

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Solution

The fourth proportional to 978,927.21, 1,350,987.93 and 543,366.72 is: 749,884.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,927.21 : 1,350,987.93 = 543,366.72 : x
  2. Step 2: Convert to fraction form
    978,927.21/1,350,987.93 = 543,366.72/x
  3. Step 3: Cross multiply
    978,927.21x = 1,350,987.93 × 543,366.72
  4. Step 4: Simplify right side
    978,927.21x = 734,081,880,283.69
  5. Step 5: Solve for x
    x = 734,081,880,283.69/978,927.21
  6. Step 6: Final answer
    x = 749,884.03

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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.