Home / 318,218.85-439,157.80-197,399.07

Finding the Fourth Proportional to 318,218.85, 439,157.80 and 197,399.07

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Solution

The fourth proportional to 318,218.85, 439,157.80 and 197,399.07 is: 272,420.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,218.85 : 439,157.80 = 197,399.07 : x
  2. Step 2: Convert to fraction form
    318,218.85/439,157.80 = 197,399.07/x
  3. Step 3: Cross multiply
    318,218.85x = 439,157.80 × 197,399.07
  4. Step 4: Simplify right side
    318,218.85x = 86,689,341,303.25
  5. Step 5: Solve for x
    x = 86,689,341,303.25/318,218.85
  6. Step 6: Final answer
    x = 272,420.51

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1.5x scale

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.