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Finding the Fourth Proportional to 498,530.08, 687,866.40 and 317,176

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Solution

The fourth proportional to 498,530.08, 687,866.40 and 317,176 is: 437,636.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,530.08 : 687,866.40 = 317,176 : x
  2. Step 2: Convert to fraction form
    498,530.08/687,866.40 = 317,176/x
  3. Step 3: Cross multiply
    498,530.08x = 687,866.40 × 317,176
  4. Step 4: Simplify right side
    498,530.08x = 218,174,713,286.40
  5. Step 5: Solve for x
    x = 218,174,713,286.40/498,530.08
  6. Step 6: Final answer
    x = 437,636.01

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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.