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Finding the Fourth Proportional to 620,442.70, 930,664.05 and 407,866.30

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Solution

The fourth proportional to 620,442.70, 930,664.05 and 407,866.30 is: 611,799.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,442.70 : 930,664.05 = 407,866.30 : x
  2. Step 2: Convert to fraction form
    620,442.70/930,664.05 = 407,866.30/x
  3. Step 3: Cross multiply
    620,442.70x = 930,664.05 × 407,866.30
  4. Step 4: Simplify right side
    620,442.70x = 379,586,502,616.52
  5. Step 5: Solve for x
    x = 379,586,502,616.52/620,442.70
  6. Step 6: Final answer
    x = 611,799.45

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Double scale
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Similar ratio
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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.