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Finding the Fourth Proportional to 613,427.80, 920,141.70 and 414,362.20

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Solution

The fourth proportional to 613,427.80, 920,141.70 and 414,362.20 is: 621,543.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,427.80 : 920,141.70 = 414,362.20 : x
  2. Step 2: Convert to fraction form
    613,427.80/920,141.70 = 414,362.20/x
  3. Step 3: Cross multiply
    613,427.80x = 920,141.70 × 414,362.20
  4. Step 4: Simplify right side
    613,427.80x = 381,271,939,123.74
  5. Step 5: Solve for x
    x = 381,271,939,123.74/613,427.80
  6. Step 6: Final answer
    x = 621,543.30

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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.