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Finding the Fourth Proportional to 978,898.07, 1,350,858.67 and 543,290.05

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Solution

The fourth proportional to 978,898.07, 1,350,858.67 and 543,290.05 is: 749,728.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,898.07 : 1,350,858.67 = 543,290.05 : x
  2. Step 2: Convert to fraction form
    978,898.07/1,350,858.67 = 543,290.05/x
  3. Step 3: Cross multiply
    978,898.07x = 1,350,858.67 × 543,290.05
  4. Step 4: Simplify right side
    978,898.07x = 733,908,074,367.23
  5. Step 5: Solve for x
    x = 733,908,074,367.23/978,898.07
  6. Step 6: Final answer
    x = 749,728.80

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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.