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Finding the Fourth Proportional to 624,419.20, 936,628.80 and 455,145.40

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Solution

The fourth proportional to 624,419.20, 936,628.80 and 455,145.40 is: 682,718.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,419.20 : 936,628.80 = 455,145.40 : x
  2. Step 2: Convert to fraction form
    624,419.20/936,628.80 = 455,145.40/x
  3. Step 3: Cross multiply
    624,419.20x = 936,628.80 × 455,145.40
  4. Step 4: Simplify right side
    624,419.20x = 426,302,289,827.52
  5. Step 5: Solve for x
    x = 426,302,289,827.52/624,419.20
  6. Step 6: Final answer
    x = 682,718.10

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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.