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Finding the Fourth Proportional to 643,652.58, 888,260.93 and 371,715.55

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Solution

The fourth proportional to 643,652.58, 888,260.93 and 371,715.55 is: 512,979.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,652.58 : 888,260.93 = 371,715.55 : x
  2. Step 2: Convert to fraction form
    643,652.58/888,260.93 = 371,715.55/x
  3. Step 3: Cross multiply
    643,652.58x = 888,260.93 × 371,715.55
  4. Step 4: Simplify right side
    643,652.58x = 330,180,400,138.46
  5. Step 5: Solve for x
    x = 330,180,400,138.46/643,652.58
  6. Step 6: Final answer
    x = 512,979.22

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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.