Home / 742,808.16-1,025,138.70-420,575.04

Finding the Fourth Proportional to 742,808.16, 1,025,138.70 and 420,575.04

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Solution

The fourth proportional to 742,808.16, 1,025,138.70 and 420,575.04 is: 580,429.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,808.16 : 1,025,138.70 = 420,575.04 : x
  2. Step 2: Convert to fraction form
    742,808.16/1,025,138.70 = 420,575.04/x
  3. Step 3: Cross multiply
    742,808.16x = 1,025,138.70 × 420,575.04
  4. Step 4: Simplify right side
    742,808.16x = 431,147,749,758.05
  5. Step 5: Solve for x
    x = 431,147,749,758.05/742,808.16
  6. Step 6: Final answer
    x = 580,429.47

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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.