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Finding the Fourth Proportional to 710,464.14, 980,428.93 and 388,167.30

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Solution

The fourth proportional to 710,464.14, 980,428.93 and 388,167.30 is: 535,664.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,464.14 : 980,428.93 = 388,167.30 : x
  2. Step 2: Convert to fraction form
    710,464.14/980,428.93 = 388,167.30/x
  3. Step 3: Cross multiply
    710,464.14x = 980,428.93 × 388,167.30
  4. Step 4: Simplify right side
    710,464.14x = 380,570,449,629.57
  5. Step 5: Solve for x
    x = 380,570,449,629.57/710,464.14
  6. Step 6: Final answer
    x = 535,664.54

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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.