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Finding the Fourth Proportional to 553,516.20, 830,274.30 and 384,679.80

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Solution

The fourth proportional to 553,516.20, 830,274.30 and 384,679.80 is: 577,019.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,516.20 : 830,274.30 = 384,679.80 : x
  2. Step 2: Convert to fraction form
    553,516.20/830,274.30 = 384,679.80/x
  3. Step 3: Cross multiply
    553,516.20x = 830,274.30 × 384,679.80
  4. Step 4: Simplify right side
    553,516.20x = 319,389,751,669.14
  5. Step 5: Solve for x
    x = 319,389,751,669.14/553,516.20
  6. Step 6: Final answer
    x = 577,019.70

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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.