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Finding the Fourth Proportional to 978,235.62, 1,349,965.19 and 548,515.78

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Solution

The fourth proportional to 978,235.62, 1,349,965.19 and 548,515.78 is: 756,951.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,235.62 : 1,349,965.19 = 548,515.78 : x
  2. Step 2: Convert to fraction form
    978,235.62/1,349,965.19 = 548,515.78/x
  3. Step 3: Cross multiply
    978,235.62x = 1,349,965.19 × 548,515.78
  4. Step 4: Simplify right side
    978,235.62x = 740,477,211,670.23
  5. Step 5: Solve for x
    x = 740,477,211,670.23/978,235.62
  6. Step 6: Final answer
    x = 756,951.80

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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.