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Finding the Fourth Proportional to 447,915.60, 618,100.20 and 278,146.08

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Solution

The fourth proportional to 447,915.60, 618,100.20 and 278,146.08 is: 383,827.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,915.60 : 618,100.20 = 278,146.08 : x
  2. Step 2: Convert to fraction form
    447,915.60/618,100.20 = 278,146.08/x
  3. Step 3: Cross multiply
    447,915.60x = 618,100.20 × 278,146.08
  4. Step 4: Simplify right side
    447,915.60x = 171,922,147,677.22
  5. Step 5: Solve for x
    x = 171,922,147,677.22/447,915.60
  6. Step 6: Final answer
    x = 383,827.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.