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Finding the Fourth Proportional to 665,641.40, 998,462.10 and 665,641.40

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Solution

The fourth proportional to 665,641.40, 998,462.10 and 665,641.40 is: 998,462.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,641.40 : 998,462.10 = 665,641.40 : x
  2. Step 2: Convert to fraction form
    665,641.40/998,462.10 = 665,641.40/x
  3. Step 3: Cross multiply
    665,641.40x = 998,462.10 × 665,641.40
  4. Step 4: Simplify right side
    665,641.40x = 664,617,710,090.94
  5. Step 5: Solve for x
    x = 664,617,710,090.94/665,641.40
  6. Step 6: Final answer
    x = 998,462.10

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Double scale
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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.