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Finding the Fourth Proportional to 559,390.68, 771,964.44 and 317,678.28

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Solution

The fourth proportional to 559,390.68, 771,964.44 and 317,678.28 is: 438,399.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,390.68 : 771,964.44 = 317,678.28 : x
  2. Step 2: Convert to fraction form
    559,390.68/771,964.44 = 317,678.28/x
  3. Step 3: Cross multiply
    559,390.68x = 771,964.44 × 317,678.28
  4. Step 4: Simplify right side
    559,390.68x = 245,236,335,520.36
  5. Step 5: Solve for x
    x = 245,236,335,520.36/559,390.68
  6. Step 6: Final answer
    x = 438,399.04

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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.