Home / 643,836.24-888,452.28-357,356.40

Finding the Fourth Proportional to 643,836.24, 888,452.28 and 357,356.40

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Solution

The fourth proportional to 643,836.24, 888,452.28 and 357,356.40 is: 493,128.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,836.24 : 888,452.28 = 357,356.40 : x
  2. Step 2: Convert to fraction form
    643,836.24/888,452.28 = 357,356.40/x
  3. Step 3: Cross multiply
    643,836.24x = 888,452.28 × 357,356.40
  4. Step 4: Simplify right side
    643,836.24x = 317,494,108,352.59
  5. Step 5: Solve for x
    x = 317,494,108,352.59/643,836.24
  6. Step 6: Final answer
    x = 493,128.67

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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.