Home / 378,928.64-522,925.80-209,162.72

Finding the Fourth Proportional to 378,928.64, 522,925.80 and 209,162.72

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Solution

The fourth proportional to 378,928.64, 522,925.80 and 209,162.72 is: 288,646.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,928.64 : 522,925.80 = 209,162.72 : x
  2. Step 2: Convert to fraction form
    378,928.64/522,925.80 = 209,162.72/x
  3. Step 3: Cross multiply
    378,928.64x = 522,925.80 × 209,162.72
  4. Step 4: Simplify right side
    378,928.64x = 109,376,583,209.13
  5. Step 5: Solve for x
    x = 109,376,583,209.13/378,928.64
  6. Step 6: Final answer
    x = 288,646.91

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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.