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Finding the Fourth Proportional to 388,863.40, 583,295.10 and 289,330.60

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Solution

The fourth proportional to 388,863.40, 583,295.10 and 289,330.60 is: 433,995.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,863.40 : 583,295.10 = 289,330.60 : x
  2. Step 2: Convert to fraction form
    388,863.40/583,295.10 = 289,330.60/x
  3. Step 3: Cross multiply
    388,863.40x = 583,295.10 × 289,330.60
  4. Step 4: Simplify right side
    388,863.40x = 168,765,121,260.06
  5. Step 5: Solve for x
    x = 168,765,121,260.06/388,863.40
  6. Step 6: Final answer
    x = 433,995.90

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.