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Finding the Fourth Proportional to 710,511.27, 980,512.44 and 388,221.36

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Solution

The fourth proportional to 710,511.27, 980,512.44 and 388,221.36 is: 535,749.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,511.27 : 980,512.44 = 388,221.36 : x
  2. Step 2: Convert to fraction form
    710,511.27/980,512.44 = 388,221.36/x
  3. Step 3: Cross multiply
    710,511.27x = 980,512.44 × 388,221.36
  4. Step 4: Simplify right side
    710,511.27x = 380,655,872,953.72
  5. Step 5: Solve for x
    x = 380,655,872,953.72/710,511.27
  6. Step 6: Final answer
    x = 535,749.24

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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.