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Finding the Fourth Proportional to 978,841.76, 1,350,810.85 and 549,131.11

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Solution

The fourth proportional to 978,841.76, 1,350,810.85 and 549,131.11 is: 757,806.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,841.76 : 1,350,810.85 = 549,131.11 : x
  2. Step 2: Convert to fraction form
    978,841.76/1,350,810.85 = 549,131.11/x
  3. Step 3: Cross multiply
    978,841.76x = 1,350,810.85 × 549,131.11
  4. Step 4: Simplify right side
    978,841.76x = 741,772,261,460.54
  5. Step 5: Solve for x
    x = 741,772,261,460.54/978,841.76
  6. Step 6: Final answer
    x = 757,806.10

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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.