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Finding the Fourth Proportional to 617,873.40, 926,810.10 and 380,446.20

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Solution

The fourth proportional to 617,873.40, 926,810.10 and 380,446.20 is: 570,669.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,873.40 : 926,810.10 = 380,446.20 : x
  2. Step 2: Convert to fraction form
    617,873.40/926,810.10 = 380,446.20/x
  3. Step 3: Cross multiply
    617,873.40x = 926,810.10 × 380,446.20
  4. Step 4: Simplify right side
    617,873.40x = 352,601,380,666.62
  5. Step 5: Solve for x
    x = 352,601,380,666.62/617,873.40
  6. Step 6: Final answer
    x = 570,669.30

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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.