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Finding the Fourth Proportional to 653,100.20, 978,338.10 and 372,289.40

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Solution

The fourth proportional to 653,100.20, 978,338.10 and 372,289.40 is: 557,686.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,100.20 : 978,338.10 = 372,289.40 : x
  2. Step 2: Convert to fraction form
    653,100.20/978,338.10 = 372,289.40/x
  3. Step 3: Cross multiply
    653,100.20x = 978,338.10 × 372,289.40
  4. Step 4: Simplify right side
    653,100.20x = 364,224,904,246.14
  5. Step 5: Solve for x
    x = 364,224,904,246.14/653,100.20
  6. Step 6: Final answer
    x = 557,686.10

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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.