Home / 643,618.08-888,179.04-357,120.72

Finding the Fourth Proportional to 643,618.08, 888,179.04 and 357,120.72

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Solution

The fourth proportional to 643,618.08, 888,179.04 and 357,120.72 is: 492,818.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,618.08 : 888,179.04 = 357,120.72 : x
  2. Step 2: Convert to fraction form
    643,618.08/888,179.04 = 357,120.72/x
  3. Step 3: Cross multiply
    643,618.08x = 888,179.04 × 357,120.72
  4. Step 4: Simplify right side
    643,618.08x = 317,187,138,253.71
  5. Step 5: Solve for x
    x = 317,187,138,253.71/643,618.08
  6. Step 6: Final answer
    x = 492,818.88

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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.