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Finding the Fourth Proportional to 477,718.80, 716,578.20 and 328,419.60

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Solution

The fourth proportional to 477,718.80, 716,578.20 and 328,419.60 is: 492,629.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    477,718.80 : 716,578.20 = 328,419.60 : x
  2. Step 2: Convert to fraction form
    477,718.80/716,578.20 = 328,419.60/x
  3. Step 3: Cross multiply
    477,718.80x = 716,578.20 × 328,419.60
  4. Step 4: Simplify right side
    477,718.80x = 235,338,325,812.72
  5. Step 5: Solve for x
    x = 235,338,325,812.72/477,718.80
  6. Step 6: Final answer
    x = 492,629.40

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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.