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Finding the Fourth Proportional to 643,805.04, 888,493.35 and 371,884.38

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Solution

The fourth proportional to 643,805.04, 888,493.35 and 371,884.38 is: 513,224.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,805.04 : 888,493.35 = 371,884.38 : x
  2. Step 2: Convert to fraction form
    643,805.04/888,493.35 = 371,884.38/x
  3. Step 3: Cross multiply
    643,805.04x = 888,493.35 × 371,884.38
  4. Step 4: Simplify right side
    643,805.04x = 330,416,798,598.87
  5. Step 5: Solve for x
    x = 330,416,798,598.87/643,805.04
  6. Step 6: Final answer
    x = 513,224.93

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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.