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Finding the Fourth Proportional to 613,267.40, 919,901.10 and 213,775.40

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Solution

The fourth proportional to 613,267.40, 919,901.10 and 213,775.40 is: 320,663.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,267.40 : 919,901.10 = 213,775.40 : x
  2. Step 2: Convert to fraction form
    613,267.40/919,901.10 = 213,775.40/x
  3. Step 3: Cross multiply
    613,267.40x = 919,901.10 × 213,775.40
  4. Step 4: Simplify right side
    613,267.40x = 196,652,225,612.94
  5. Step 5: Solve for x
    x = 196,652,225,612.94/613,267.40
  6. Step 6: Final answer
    x = 320,663.10

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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.