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Finding the Fourth Proportional to 978,868.80, 1,468,838.16 and 379,853.64

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Solution

The fourth proportional to 978,868.80, 1,468,838.16 and 379,853.64 is: 569,988.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,868.80 : 1,468,838.16 = 379,853.64 : x
  2. Step 2: Convert to fraction form
    978,868.80/1,468,838.16 = 379,853.64/x
  3. Step 3: Cross multiply
    978,868.80x = 1,468,838.16 × 379,853.64
  4. Step 4: Simplify right side
    978,868.80x = 557,943,521,646.90
  5. Step 5: Solve for x
    x = 557,943,521,646.90/978,868.80
  6. Step 6: Final answer
    x = 569,988.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.