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Finding the Fourth Proportional to 710,845.84, 980,967.30 and 388,557.20

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Solution

The fourth proportional to 710,845.84, 980,967.30 and 388,557.20 is: 536,208.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,845.84 : 980,967.30 = 388,557.20 : x
  2. Step 2: Convert to fraction form
    710,845.84/980,967.30 = 388,557.20/x
  3. Step 3: Cross multiply
    710,845.84x = 980,967.30 × 388,557.20
  4. Step 4: Simplify right side
    710,845.84x = 381,161,907,379.56
  5. Step 5: Solve for x
    x = 381,161,907,379.56/710,845.84
  6. Step 6: Final answer
    x = 536,208.96

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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.