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Finding the Fourth Proportional to 521,881, 720,196.26 and 283,417

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Solution

The fourth proportional to 521,881, 720,196.26 and 283,417 is: 391,115.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,881 : 720,196.26 = 283,417 : x
  2. Step 2: Convert to fraction form
    521,881/720,196.26 = 283,417/x
  3. Step 3: Cross multiply
    521,881x = 720,196.26 × 283,417
  4. Step 4: Simplify right side
    521,881x = 204,115,863,420.42
  5. Step 5: Solve for x
    x = 204,115,863,420.42/521,881
  6. Step 6: Final answer
    x = 391,115.72

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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.