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Finding the Fourth Proportional to 821,671.40, 1,233,774.30 and 448,423.40

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Solution

The fourth proportional to 821,671.40, 1,233,774.30 and 448,423.40 is: 673,326.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,671.40 : 1,233,774.30 = 448,423.40 : x
  2. Step 2: Convert to fraction form
    821,671.40/1,233,774.30 = 448,423.40/x
  3. Step 3: Cross multiply
    821,671.40x = 1,233,774.30 × 448,423.40
  4. Step 4: Simplify right side
    821,671.40x = 553,253,266,438.62
  5. Step 5: Solve for x
    x = 553,253,266,438.62/821,671.40
  6. Step 6: Final answer
    x = 673,326.67

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Double scale
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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.