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Finding the Fourth Proportional to 374,357.19, 516,426.96 and 221,320.86

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Solution

The fourth proportional to 374,357.19, 516,426.96 and 221,320.86 is: 305,312.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    374,357.19 : 516,426.96 = 221,320.86 : x
  2. Step 2: Convert to fraction form
    374,357.19/516,426.96 = 221,320.86/x
  3. Step 3: Cross multiply
    374,357.19x = 516,426.96 × 221,320.86
  4. Step 4: Simplify right side
    374,357.19x = 114,296,056,562.81
  5. Step 5: Solve for x
    x = 114,296,056,562.81/374,357.19
  6. Step 6: Final answer
    x = 305,312.84

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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.