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Finding the Fourth Proportional to 716,147.50, 988,308.39 and 393,881.98

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Solution

The fourth proportional to 716,147.50, 988,308.39 and 393,881.98 is: 543,570.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,147.50 : 988,308.39 = 393,881.98 : x
  2. Step 2: Convert to fraction form
    716,147.50/988,308.39 = 393,881.98/x
  3. Step 3: Cross multiply
    716,147.50x = 988,308.39 × 393,881.98
  4. Step 4: Simplify right side
    716,147.50x = 389,276,865,503.81
  5. Step 5: Solve for x
    x = 389,276,865,503.81/716,147.50
  6. Step 6: Final answer
    x = 543,570.79

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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.