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Finding the Fourth Proportional to 710,844.84, 980,965.92 and 388,556.20

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Solution

The fourth proportional to 710,844.84, 980,965.92 and 388,556.20 is: 536,207.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,844.84 : 980,965.92 = 388,556.20 : x
  2. Step 2: Convert to fraction form
    710,844.84/980,965.92 = 388,556.20/x
  3. Step 3: Cross multiply
    710,844.84x = 980,965.92 × 388,556.20
  4. Step 4: Simplify right side
    710,844.84x = 381,160,390,204.70
  5. Step 5: Solve for x
    x = 381,160,390,204.70/710,844.84
  6. Step 6: Final answer
    x = 536,207.58

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1.5x scale

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.