Home / 390,829.20-586,336.28-311,168.40

Finding the Fourth Proportional to 390,829.20, 586,336.28 and 311,168.40

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Solution

The fourth proportional to 390,829.20, 586,336.28 and 311,168.40 is: 466,826.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,829.20 : 586,336.28 = 311,168.40 : x
  2. Step 2: Convert to fraction form
    390,829.20/586,336.28 = 311,168.40/x
  3. Step 3: Cross multiply
    390,829.20x = 586,336.28 × 311,168.40
  4. Step 4: Simplify right side
    390,829.20x = 182,449,322,109.55
  5. Step 5: Solve for x
    x = 182,449,322,109.55/390,829.20
  6. Step 6: Final answer
    x = 466,826.23

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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.