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Finding the Fourth Proportional to 710,730.82, 980,805 and 388,433.44

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Solution

The fourth proportional to 710,730.82, 980,805 and 388,433.44 is: 536,036.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,730.82 : 980,805 = 388,433.44 : x
  2. Step 2: Convert to fraction form
    710,730.82/980,805 = 388,433.44/x
  3. Step 3: Cross multiply
    710,730.82x = 980,805 × 388,433.44
  4. Step 4: Simplify right side
    710,730.82x = 380,977,460,119.20
  5. Step 5: Solve for x
    x = 380,977,460,119.20/710,730.82
  6. Step 6: Final answer
    x = 536,036.22

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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.