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Finding the Fourth Proportional to 613,298.70, 919,948.05 and 276,719.40

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Solution

The fourth proportional to 613,298.70, 919,948.05 and 276,719.40 is: 415,079.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,298.70 : 919,948.05 = 276,719.40 : x
  2. Step 2: Convert to fraction form
    613,298.70/919,948.05 = 276,719.40/x
  3. Step 3: Cross multiply
    613,298.70x = 919,948.05 × 276,719.40
  4. Step 4: Simplify right side
    613,298.70x = 254,567,472,427.17
  5. Step 5: Solve for x
    x = 254,567,472,427.17/613,298.70
  6. Step 6: Final answer
    x = 415,079.10

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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.