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Finding the Fourth Proportional to 268,308.30, 402,462.45 and 128,340.30

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Solution

The fourth proportional to 268,308.30, 402,462.45 and 128,340.30 is: 192,510.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,308.30 : 402,462.45 = 128,340.30 : x
  2. Step 2: Convert to fraction form
    268,308.30/402,462.45 = 128,340.30/x
  3. Step 3: Cross multiply
    268,308.30x = 402,462.45 × 128,340.30
  4. Step 4: Simplify right side
    268,308.30x = 51,652,151,571.74
  5. Step 5: Solve for x
    x = 51,652,151,571.74/268,308.30
  6. Step 6: Final answer
    x = 192,510.45

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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.