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Finding the Fourth Proportional to 624,402.20, 936,603.30 and 455,128.40

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Solution

The fourth proportional to 624,402.20, 936,603.30 and 455,128.40 is: 682,692.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,402.20 : 936,603.30 = 455,128.40 : x
  2. Step 2: Convert to fraction form
    624,402.20/936,603.30 = 455,128.40/x
  3. Step 3: Cross multiply
    624,402.20x = 936,603.30 × 455,128.40
  4. Step 4: Simplify right side
    624,402.20x = 426,274,761,363.72
  5. Step 5: Solve for x
    x = 426,274,761,363.72/624,402.20
  6. Step 6: Final answer
    x = 682,692.60

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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.