Home / 685,703.62-1,028,719.65-286,122.11

Finding the Fourth Proportional to 685,703.62, 1,028,719.65 and 286,122.11

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Solution

The fourth proportional to 685,703.62, 1,028,719.65 and 286,122.11 is: 429,251.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,703.62 : 1,028,719.65 = 286,122.11 : x
  2. Step 2: Convert to fraction form
    685,703.62/1,028,719.65 = 286,122.11/x
  3. Step 3: Cross multiply
    685,703.62x = 1,028,719.65 × 286,122.11
  4. Step 4: Simplify right side
    685,703.62x = 294,339,436,856.46
  5. Step 5: Solve for x
    x = 294,339,436,856.46/685,703.62
  6. Step 6: Final answer
    x = 429,251.69

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1.5x scale

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.