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Finding the Fourth Proportional to 710,711.33, 980,781.74 and 388,421.34

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Solution

The fourth proportional to 710,711.33, 980,781.74 and 388,421.34 is: 536,021.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,711.33 : 980,781.74 = 388,421.34 : x
  2. Step 2: Convert to fraction form
    710,711.33/980,781.74 = 388,421.34/x
  3. Step 3: Cross multiply
    710,711.33x = 980,781.74 × 388,421.34
  4. Step 4: Simplify right side
    710,711.33x = 380,956,555,756.23
  5. Step 5: Solve for x
    x = 380,956,555,756.23/710,711.33
  6. Step 6: Final answer
    x = 536,021.51

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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.