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Finding the Fourth Proportional to 561,099.40, 842,426.70 and 442,904.20

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Solution

The fourth proportional to 561,099.40, 842,426.70 and 442,904.20 is: 664,970.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,099.40 : 842,426.70 = 442,904.20 : x
  2. Step 2: Convert to fraction form
    561,099.40/842,426.70 = 442,904.20/x
  3. Step 3: Cross multiply
    561,099.40x = 842,426.70 × 442,904.20
  4. Step 4: Simplify right side
    561,099.40x = 373,114,323,622.14
  5. Step 5: Solve for x
    x = 373,114,323,622.14/561,099.40
  6. Step 6: Final answer
    x = 664,970.10

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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.