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Finding the Fourth Proportional to 710,419.41, 980,366.49 and 388,121.22

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Solution

The fourth proportional to 710,419.41, 980,366.49 and 388,121.22 is: 535,600.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,419.41 : 980,366.49 = 388,121.22 : x
  2. Step 2: Convert to fraction form
    710,419.41/980,366.49 = 388,121.22/x
  3. Step 3: Cross multiply
    710,419.41x = 980,366.49 × 388,121.22
  4. Step 4: Simplify right side
    710,419.41x = 380,501,038,145.92
  5. Step 5: Solve for x
    x = 380,501,038,145.92/710,419.41
  6. Step 6: Final answer
    x = 535,600.57

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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.