Home / 643,575.20-888,187.28-357,188

Finding the Fourth Proportional to 643,575.20, 888,187.28 and 357,188

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Solution

The fourth proportional to 643,575.20, 888,187.28 and 357,188 is: 492,949.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,575.20 : 888,187.28 = 357,188 : x
  2. Step 2: Convert to fraction form
    643,575.20/888,187.28 = 357,188/x
  3. Step 3: Cross multiply
    643,575.20x = 888,187.28 × 357,188
  4. Step 4: Simplify right side
    643,575.20x = 317,249,838,168.64
  5. Step 5: Solve for x
    x = 317,249,838,168.64/643,575.20
  6. Step 6: Final answer
    x = 492,949.14

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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.