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Finding the Fourth Proportional to 553,542.30, 830,313.45 and 382,300.20

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Solution

The fourth proportional to 553,542.30, 830,313.45 and 382,300.20 is: 573,450.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,542.30 : 830,313.45 = 382,300.20 : x
  2. Step 2: Convert to fraction form
    553,542.30/830,313.45 = 382,300.20/x
  3. Step 3: Cross multiply
    553,542.30x = 830,313.45 × 382,300.20
  4. Step 4: Simplify right side
    553,542.30x = 317,428,997,997.69
  5. Step 5: Solve for x
    x = 317,428,997,997.69/553,542.30
  6. Step 6: Final answer
    x = 573,450.30

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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.