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Finding the Fourth Proportional to 710,348.43, 980,264.79 and 388,059.96

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Solution

The fourth proportional to 710,348.43, 980,264.79 and 388,059.96 is: 535,513.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,348.43 : 980,264.79 = 388,059.96 : x
  2. Step 2: Convert to fraction form
    710,348.43/980,264.79 = 388,059.96/x
  3. Step 3: Cross multiply
    710,348.43x = 980,264.79 × 388,059.96
  4. Step 4: Simplify right side
    710,348.43x = 380,401,515,196.81
  5. Step 5: Solve for x
    x = 380,401,515,196.81/710,348.43
  6. Step 6: Final answer
    x = 535,513.98

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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.