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Finding the Fourth Proportional to 653,486.20, 978,917.10 and 372,675.40

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Solution

The fourth proportional to 653,486.20, 978,917.10 and 372,675.40 is: 558,264.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,486.20 : 978,917.10 = 372,675.40 : x
  2. Step 2: Convert to fraction form
    653,486.20/978,917.10 = 372,675.40/x
  3. Step 3: Cross multiply
    653,486.20x = 978,917.10 × 372,675.40
  4. Step 4: Simplify right side
    653,486.20x = 364,818,321,809.34
  5. Step 5: Solve for x
    x = 364,818,321,809.34/653,486.20
  6. Step 6: Final answer
    x = 558,264.77

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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.