Home / 390,925.22-539,447.00-218,803.76

Finding the Fourth Proportional to 390,925.22, 539,447.00 and 218,803.76

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Solution

The fourth proportional to 390,925.22, 539,447.00 and 218,803.76 is: 301,932.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,925.22 : 539,447.00 = 218,803.76 : x
  2. Step 2: Convert to fraction form
    390,925.22/539,447.00 = 218,803.76/x
  3. Step 3: Cross multiply
    390,925.22x = 539,447.00 × 218,803.76
  4. Step 4: Simplify right side
    390,925.22x = 118,033,033,816.35
  5. Step 5: Solve for x
    x = 118,033,033,816.35/390,925.22
  6. Step 6: Final answer
    x = 301,932.51

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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.