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Finding the Fourth Proportional to 718,018.60, 990,825.24 and 395,727.72

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Solution

The fourth proportional to 718,018.60, 990,825.24 and 395,727.72 is: 546,081.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,018.60 : 990,825.24 = 395,727.72 : x
  2. Step 2: Convert to fraction form
    718,018.60/990,825.24 = 395,727.72/x
  3. Step 3: Cross multiply
    718,018.60x = 990,825.24 × 395,727.72
  4. Step 4: Simplify right side
    718,018.60x = 392,097,013,143.65
  5. Step 5: Solve for x
    x = 392,097,013,143.65/718,018.60
  6. Step 6: Final answer
    x = 546,081.97

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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.