Home / 661,515.40-912,815.22-374,978.44

Finding the Fourth Proportional to 661,515.40, 912,815.22 and 374,978.44

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Solution

The fourth proportional to 661,515.40, 912,815.22 and 374,978.44 is: 517,427.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,515.40 : 912,815.22 = 374,978.44 : x
  2. Step 2: Convert to fraction form
    661,515.40/912,815.22 = 374,978.44/x
  3. Step 3: Cross multiply
    661,515.40x = 912,815.22 × 374,978.44
  4. Step 4: Simplify right side
    661,515.40x = 342,286,027,203.86
  5. Step 5: Solve for x
    x = 342,286,027,203.86/661,515.40
  6. Step 6: Final answer
    x = 517,427.15

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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.