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Finding the Fourth Proportional to 642,473.47, 886,600.16 and 355,991.05

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Solution

The fourth proportional to 642,473.47, 886,600.16 and 355,991.05 is: 491,260.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,473.47 : 886,600.16 = 355,991.05 : x
  2. Step 2: Convert to fraction form
    642,473.47/886,600.16 = 355,991.05/x
  3. Step 3: Cross multiply
    642,473.47x = 886,600.16 × 355,991.05
  4. Step 4: Simplify right side
    642,473.47x = 315,621,717,455.57
  5. Step 5: Solve for x
    x = 315,621,717,455.57/642,473.47
  6. Step 6: Final answer
    x = 491,260.32

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1.5x scale

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.