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Finding the Fourth Proportional to 978,690.55, 1,350,590.19 and 543,173.65

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Solution

The fourth proportional to 978,690.55, 1,350,590.19 and 543,173.65 is: 749,578.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,690.55 : 1,350,590.19 = 543,173.65 : x
  2. Step 2: Convert to fraction form
    978,690.55/1,350,590.19 = 543,173.65/x
  3. Step 3: Cross multiply
    978,690.55x = 1,350,590.19 × 543,173.65
  4. Step 4: Simplify right side
    978,690.55x = 733,605,003,156.49
  5. Step 5: Solve for x
    x = 733,605,003,156.49/978,690.55
  6. Step 6: Final answer
    x = 749,578.10

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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.