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Finding the Fourth Proportional to 553,425.07, 830,137.83 and 427,249.53

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Solution

The fourth proportional to 553,425.07, 830,137.83 and 427,249.53 is: 640,874.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,425.07 : 830,137.83 = 427,249.53 : x
  2. Step 2: Convert to fraction form
    553,425.07/830,137.83 = 427,249.53/x
  3. Step 3: Cross multiply
    553,425.07x = 830,137.83 × 427,249.53
  4. Step 4: Simplify right side
    553,425.07x = 354,675,997,702.72
  5. Step 5: Solve for x
    x = 354,675,997,702.72/553,425.07
  6. Step 6: Final answer
    x = 640,874.47

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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.