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Finding the Fourth Proportional to 288,505.12, 432,494.01 and 128,496.91

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Solution

The fourth proportional to 288,505.12, 432,494.01 and 128,496.91 is: 192,627.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,505.12 : 432,494.01 = 128,496.91 : x
  2. Step 2: Convert to fraction form
    288,505.12/432,494.01 = 128,496.91/x
  3. Step 3: Cross multiply
    288,505.12x = 432,494.01 × 128,496.91
  4. Step 4: Simplify right side
    288,505.12x = 55,574,141,716.04
  5. Step 5: Solve for x
    x = 55,574,141,716.04/288,505.12
  6. Step 6: Final answer
    x = 192,627.93

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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.