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Finding the Fourth Proportional to 553,346.70, 830,020.05 and 488,028.30

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Solution

The fourth proportional to 553,346.70, 830,020.05 and 488,028.30 is: 732,042.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,346.70 : 830,020.05 = 488,028.30 : x
  2. Step 2: Convert to fraction form
    553,346.70/830,020.05 = 488,028.30/x
  3. Step 3: Cross multiply
    553,346.70x = 830,020.05 × 488,028.30
  4. Step 4: Simplify right side
    553,346.70x = 405,073,273,967.42
  5. Step 5: Solve for x
    x = 405,073,273,967.42/553,346.70
  6. Step 6: Final answer
    x = 732,042.45

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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.