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Finding the Fourth Proportional to 578,662.31, 798,526.09 and 320,521.79

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Solution

The fourth proportional to 578,662.31, 798,526.09 and 320,521.79 is: 442,304.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,662.31 : 798,526.09 = 320,521.79 : x
  2. Step 2: Convert to fraction form
    578,662.31/798,526.09 = 320,521.79/x
  3. Step 3: Cross multiply
    578,662.31x = 798,526.09 × 320,521.79
  4. Step 4: Simplify right side
    578,662.31x = 255,945,011,728.50
  5. Step 5: Solve for x
    x = 255,945,011,728.50/578,662.31
  6. Step 6: Final answer
    x = 442,304.62

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.