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Finding the Fourth Proportional to 553,435.08, 830,152.82 and 427,259.56

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Solution

The fourth proportional to 553,435.08, 830,152.82 and 427,259.56 is: 640,889.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,435.08 : 830,152.82 = 427,259.56 : x
  2. Step 2: Convert to fraction form
    553,435.08/830,152.82 = 427,259.56/x
  3. Step 3: Cross multiply
    553,435.08x = 830,152.82 × 427,259.56
  4. Step 4: Simplify right side
    553,435.08x = 354,690,728,605.96
  5. Step 5: Solve for x
    x = 354,690,728,605.96/553,435.08
  6. Step 6: Final answer
    x = 640,889.49

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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.