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Finding the Fourth Proportional to 710,635.98, 980,680.21 and 388,346.11

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Solution

The fourth proportional to 710,635.98, 980,680.21 and 388,346.11 is: 535,919.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,635.98 : 980,680.21 = 388,346.11 : x
  2. Step 2: Convert to fraction form
    710,635.98/980,680.21 = 388,346.11/x
  3. Step 3: Cross multiply
    710,635.98x = 980,680.21 × 388,346.11
  4. Step 4: Simplify right side
    710,635.98x = 380,843,344,707.48
  5. Step 5: Solve for x
    x = 380,843,344,707.48/710,635.98
  6. Step 6: Final answer
    x = 535,919.03

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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.