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Finding the Fourth Proportional to 408,567.68, 612,851.64 and 128,106.80

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Solution

The fourth proportional to 408,567.68, 612,851.64 and 128,106.80 is: 192,160.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,567.68 : 612,851.64 = 128,106.80 : x
  2. Step 2: Convert to fraction form
    408,567.68/612,851.64 = 128,106.80/x
  3. Step 3: Cross multiply
    408,567.68x = 612,851.64 × 128,106.80
  4. Step 4: Simplify right side
    408,567.68x = 78,510,462,475.15
  5. Step 5: Solve for x
    x = 78,510,462,475.15/408,567.68
  6. Step 6: Final answer
    x = 192,160.24

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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.