Home / 815,444.64-1,221,304.68-389,280.24

Finding the Fourth Proportional to 815,444.64, 1,221,304.68 and 389,280.24

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Solution

The fourth proportional to 815,444.64, 1,221,304.68 and 389,280.24 is: 583,031.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,444.64 : 1,221,304.68 = 389,280.24 : x
  2. Step 2: Convert to fraction form
    815,444.64/1,221,304.68 = 389,280.24/x
  3. Step 3: Cross multiply
    815,444.64x = 1,221,304.68 × 389,280.24
  4. Step 4: Simplify right side
    815,444.64x = 475,429,778,943.52
  5. Step 5: Solve for x
    x = 475,429,778,943.52/815,444.64
  6. Step 6: Final answer
    x = 583,031.34

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Double scale
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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.