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Finding the Fourth Proportional to 710,850.21, 980,973.22 and 388,561.60

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Solution

The fourth proportional to 710,850.21, 980,973.22 and 388,561.60 is: 536,214.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,850.21 : 980,973.22 = 388,561.60 : x
  2. Step 2: Convert to fraction form
    710,850.21/980,973.22 = 388,561.60/x
  3. Step 3: Cross multiply
    710,850.21x = 980,973.22 × 388,561.60
  4. Step 4: Simplify right side
    710,850.21x = 381,168,523,920.35
  5. Step 5: Solve for x
    x = 381,168,523,920.35/710,850.21
  6. Step 6: Final answer
    x = 536,214.97

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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.