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Finding the Fourth Proportional to 357,318.51, 493,330.28 and 221,496.90

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Solution

The fourth proportional to 357,318.51, 493,330.28 and 221,496.90 is: 305,808.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,318.51 : 493,330.28 = 221,496.90 : x
  2. Step 2: Convert to fraction form
    357,318.51/493,330.28 = 221,496.90/x
  3. Step 3: Cross multiply
    357,318.51x = 493,330.28 × 221,496.90
  4. Step 4: Simplify right side
    357,318.51x = 109,271,126,588.65
  5. Step 5: Solve for x
    x = 109,271,126,588.65/357,318.51
  6. Step 6: Final answer
    x = 305,808.75

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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.