Home / 380,268.86-570,964.02-212,117.72

Finding the Fourth Proportional to 380,268.86, 570,964.02 and 212,117.72

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Solution

The fourth proportional to 380,268.86, 570,964.02 and 212,117.72 is: 318,489.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,268.86 : 570,964.02 = 212,117.72 : x
  2. Step 2: Convert to fraction form
    380,268.86/570,964.02 = 212,117.72/x
  3. Step 3: Cross multiply
    380,268.86x = 570,964.02 × 212,117.72
  4. Step 4: Simplify right side
    380,268.86x = 121,111,586,124.43
  5. Step 5: Solve for x
    x = 121,111,586,124.43/380,268.86
  6. Step 6: Final answer
    x = 318,489.36

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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.