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Finding the Fourth Proportional to 978,844.85, 1,350,815.10 and 549,134.20

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Solution

The fourth proportional to 978,844.85, 1,350,815.10 and 549,134.20 is: 757,810.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,844.85 : 1,350,815.10 = 549,134.20 : x
  2. Step 2: Convert to fraction form
    978,844.85/1,350,815.10 = 549,134.20/x
  3. Step 3: Cross multiply
    978,844.85x = 1,350,815.10 × 549,134.20
  4. Step 4: Simplify right side
    978,844.85x = 741,778,767,597.90
  5. Step 5: Solve for x
    x = 741,778,767,597.90/978,844.85
  6. Step 6: Final answer
    x = 757,810.36

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1.5x scale

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.