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Finding the Fourth Proportional to 716,242.50, 988,415.16 and 393,977.10

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Solution

The fourth proportional to 716,242.50, 988,415.16 and 393,977.10 is: 543,688.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,242.50 : 988,415.16 = 393,977.10 : x
  2. Step 2: Convert to fraction form
    716,242.50/988,415.16 = 393,977.10/x
  3. Step 3: Cross multiply
    716,242.50x = 988,415.16 × 393,977.10
  4. Step 4: Simplify right side
    716,242.50x = 389,412,938,332.84
  5. Step 5: Solve for x
    x = 389,412,938,332.84/716,242.50
  6. Step 6: Final answer
    x = 543,688.68

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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.