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Finding the Fourth Proportional to 374,598.40, 516,903.36 and 221,641.28

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Solution

The fourth proportional to 374,598.40, 516,903.36 and 221,641.28 is: 305,839.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    374,598.40 : 516,903.36 = 221,641.28 : x
  2. Step 2: Convert to fraction form
    374,598.40/516,903.36 = 221,641.28/x
  3. Step 3: Cross multiply
    374,598.40x = 516,903.36 × 221,641.28
  4. Step 4: Simplify right side
    374,598.40x = 114,567,122,346.70
  5. Step 5: Solve for x
    x = 114,567,122,346.70/374,598.40
  6. Step 6: Final answer
    x = 305,839.86

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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.