Home / 643,748.92-888,388.10-357,287.46

Finding the Fourth Proportional to 643,748.92, 888,388.10 and 357,287.46

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Solution

The fourth proportional to 643,748.92, 888,388.10 and 357,287.46 is: 493,064.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,748.92 : 888,388.10 = 357,287.46 : x
  2. Step 2: Convert to fraction form
    643,748.92/888,388.10 = 357,287.46/x
  3. Step 3: Cross multiply
    643,748.92x = 888,388.10 × 357,287.46
  4. Step 4: Simplify right side
    643,748.92x = 317,409,925,974.90
  5. Step 5: Solve for x
    x = 317,409,925,974.90/643,748.92
  6. Step 6: Final answer
    x = 493,064.79

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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.