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Finding the Fourth Proportional to 687,556.68, 948,813.51 and 381,615.22

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Solution

The fourth proportional to 687,556.68, 948,813.51 and 381,615.22 is: 526,620.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,556.68 : 948,813.51 = 381,615.22 : x
  2. Step 2: Convert to fraction form
    687,556.68/948,813.51 = 381,615.22/x
  3. Step 3: Cross multiply
    687,556.68x = 948,813.51 × 381,615.22
  4. Step 4: Simplify right side
    687,556.68x = 362,081,676,357.62
  5. Step 5: Solve for x
    x = 362,081,676,357.62/687,556.68
  6. Step 6: Final answer
    x = 526,620.84

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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.