Home / 389,328.60-583,992.90-386,704.20

Finding the Fourth Proportional to 389,328.60, 583,992.90 and 386,704.20

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Solution

The fourth proportional to 389,328.60, 583,992.90 and 386,704.20 is: 580,056.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,328.60 : 583,992.90 = 386,704.20 : x
  2. Step 2: Convert to fraction form
    389,328.60/583,992.90 = 386,704.20/x
  3. Step 3: Cross multiply
    389,328.60x = 583,992.90 × 386,704.20
  4. Step 4: Simplify right side
    389,328.60x = 225,832,507,200.18
  5. Step 5: Solve for x
    x = 225,832,507,200.18/389,328.60
  6. Step 6: Final answer
    x = 580,056.30

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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.