Home / 689,421.40-1,034,715.30-310,924.60

Finding the Fourth Proportional to 689,421.40, 1,034,715.30 and 310,924.60

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Solution

The fourth proportional to 689,421.40, 1,034,715.30 and 310,924.60 is: 466,649.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,421.40 : 1,034,715.30 = 310,924.60 : x
  2. Step 2: Convert to fraction form
    689,421.40/1,034,715.30 = 310,924.60/x
  3. Step 3: Cross multiply
    689,421.40x = 1,034,715.30 × 310,924.60
  4. Step 4: Simplify right side
    689,421.40x = 321,718,440,766.38
  5. Step 5: Solve for x
    x = 321,718,440,766.38/689,421.40
  6. Step 6: Final answer
    x = 466,649.92

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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.