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Finding the Fourth Proportional to 710,485.92, 980,439.84 and 388,180.80

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Solution

The fourth proportional to 710,485.92, 980,439.84 and 388,180.80 is: 535,672.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,485.92 : 980,439.84 = 388,180.80 : x
  2. Step 2: Convert to fraction form
    710,485.92/980,439.84 = 388,180.80/x
  3. Step 3: Cross multiply
    710,485.92x = 980,439.84 × 388,180.80
  4. Step 4: Simplify right side
    710,485.92x = 380,587,921,443.07
  5. Step 5: Solve for x
    x = 380,587,921,443.07/710,485.92
  6. Step 6: Final answer
    x = 535,672.71

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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.