Home / 742,808.60-1,025,065.94-420,510.44

Finding the Fourth Proportional to 742,808.60, 1,025,065.94 and 420,510.44

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Solution

The fourth proportional to 742,808.60, 1,025,065.94 and 420,510.44 is: 580,298.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,808.60 : 1,025,065.94 = 420,510.44 : x
  2. Step 2: Convert to fraction form
    742,808.60/1,025,065.94 = 420,510.44/x
  3. Step 3: Cross multiply
    742,808.60x = 1,025,065.94 × 420,510.44
  4. Step 4: Simplify right side
    742,808.60x = 431,050,929,458.41
  5. Step 5: Solve for x
    x = 431,050,929,458.41/742,808.60
  6. Step 6: Final answer
    x = 580,298.79

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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.