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Finding the Fourth Proportional to 678,910.40, 949,230.40 and 678,910.40

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Solution

The fourth proportional to 678,910.40, 949,230.40 and 678,910.40 is: 949,230.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,910.40 : 949,230.40 = 678,910.40 : x
  2. Step 2: Convert to fraction form
    678,910.40/949,230.40 = 678,910.40/x
  3. Step 3: Cross multiply
    678,910.40x = 949,230.40 × 678,910.40
  4. Step 4: Simplify right side
    678,910.40x = 644,442,390,556.16
  5. Step 5: Solve for x
    x = 644,442,390,556.16/678,910.40
  6. Step 6: Final answer
    x = 949,230.40

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.