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Finding the Fourth Proportional to 710,462.92, 980,427.39 and 388,166.10

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Solution

The fourth proportional to 710,462.92, 980,427.39 and 388,166.10 is: 535,662.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,462.92 : 980,427.39 = 388,166.10 : x
  2. Step 2: Convert to fraction form
    710,462.92/980,427.39 = 388,166.10/x
  3. Step 3: Cross multiply
    710,462.92x = 980,427.39 × 388,166.10
  4. Step 4: Simplify right side
    710,462.92x = 380,568,676,118.14
  5. Step 5: Solve for x
    x = 380,568,676,118.14/710,462.92
  6. Step 6: Final answer
    x = 535,662.97

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Similar ratio
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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.