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Finding the Fourth Proportional to 718,122.52, 990,964 and 395,814.88

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Solution

The fourth proportional to 718,122.52, 990,964 and 395,814.88 is: 546,199.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,122.52 : 990,964 = 395,814.88 : x
  2. Step 2: Convert to fraction form
    718,122.52/990,964 = 395,814.88/x
  3. Step 3: Cross multiply
    718,122.52x = 990,964 × 395,814.88
  4. Step 4: Simplify right side
    718,122.52x = 392,238,296,744.32
  5. Step 5: Solve for x
    x = 392,238,296,744.32/718,122.52
  6. Step 6: Final answer
    x = 546,199.69

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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.