Home / 815,671.77-1,221,643.92-389,506.12

Finding the Fourth Proportional to 815,671.77, 1,221,643.92 and 389,506.12

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Solution

The fourth proportional to 815,671.77, 1,221,643.92 and 389,506.12 is: 583,369.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,671.77 : 1,221,643.92 = 389,506.12 : x
  2. Step 2: Convert to fraction form
    815,671.77/1,221,643.92 = 389,506.12/x
  3. Step 3: Cross multiply
    815,671.77x = 1,221,643.92 × 389,506.12
  4. Step 4: Simplify right side
    815,671.77x = 475,837,781,707.33
  5. Step 5: Solve for x
    x = 475,837,781,707.33/815,671.77
  6. Step 6: Final answer
    x = 583,369.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.