Home / 643,923.68-888,570.23-357,421.23

Finding the Fourth Proportional to 643,923.68, 888,570.23 and 357,421.23

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Solution

The fourth proportional to 643,923.68, 888,570.23 and 357,421.23 is: 493,216.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,923.68 : 888,570.23 = 357,421.23 : x
  2. Step 2: Convert to fraction form
    643,923.68/888,570.23 = 357,421.23/x
  3. Step 3: Cross multiply
    643,923.68x = 888,570.23 × 357,421.23
  4. Step 4: Simplify right side
    643,923.68x = 317,593,862,760.88
  5. Step 5: Solve for x
    x = 317,593,862,760.88/643,923.68
  6. Step 6: Final answer
    x = 493,216.63

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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.