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Finding the Fourth Proportional to 547,346.40, 821,019.60 and 448,931.40

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Solution

The fourth proportional to 547,346.40, 821,019.60 and 448,931.40 is: 673,397.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,346.40 : 821,019.60 = 448,931.40 : x
  2. Step 2: Convert to fraction form
    547,346.40/821,019.60 = 448,931.40/x
  3. Step 3: Cross multiply
    547,346.40x = 821,019.60 × 448,931.40
  4. Step 4: Simplify right side
    547,346.40x = 368,581,478,455.44
  5. Step 5: Solve for x
    x = 368,581,478,455.44/547,346.40
  6. Step 6: Final answer
    x = 673,397.10

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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.