Home / 420,829.40-631,246.54-140,345.84

Finding the Fourth Proportional to 420,829.40, 631,246.54 and 140,345.84

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Solution

The fourth proportional to 420,829.40, 631,246.54 and 140,345.84 is: 210,519.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,829.40 : 631,246.54 = 140,345.84 : x
  2. Step 2: Convert to fraction form
    420,829.40/631,246.54 = 140,345.84/x
  3. Step 3: Cross multiply
    420,829.40x = 631,246.54 × 140,345.84
  4. Step 4: Simplify right side
    420,829.40x = 88,592,825,903.39
  5. Step 5: Solve for x
    x = 88,592,825,903.39/420,829.40
  6. Step 6: Final answer
    x = 210,519.57

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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.