Home / 209,465.12-312,774.64-203,789.72

Finding the Fourth Proportional to 209,465.12, 312,774.64 and 203,789.72

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Solution

The fourth proportional to 209,465.12, 312,774.64 and 203,789.72 is: 304,300.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,465.12 : 312,774.64 = 203,789.72 : x
  2. Step 2: Convert to fraction form
    209,465.12/312,774.64 = 203,789.72/x
  3. Step 3: Cross multiply
    209,465.12x = 312,774.64 × 203,789.72
  4. Step 4: Simplify right side
    209,465.12x = 63,740,256,308.70
  5. Step 5: Solve for x
    x = 63,740,256,308.70/209,465.12
  6. Step 6: Final answer
    x = 304,300.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.