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Finding the Fourth Proportional to 624,411.20, 936,616.80 and 455,137.40

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Solution

The fourth proportional to 624,411.20, 936,616.80 and 455,137.40 is: 682,706.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,411.20 : 936,616.80 = 455,137.40 : x
  2. Step 2: Convert to fraction form
    624,411.20/936,616.80 = 455,137.40/x
  3. Step 3: Cross multiply
    624,411.20x = 936,616.80 × 455,137.40
  4. Step 4: Simplify right side
    624,411.20x = 426,289,335,148.32
  5. Step 5: Solve for x
    x = 426,289,335,148.32/624,411.20
  6. Step 6: Final answer
    x = 682,706.10

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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.