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Finding the Fourth Proportional to 255,431.47, 352,453.20 and 154,829.47

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Solution

The fourth proportional to 255,431.47, 352,453.20 and 154,829.47 is: 213,639.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,431.47 : 352,453.20 = 154,829.47 : x
  2. Step 2: Convert to fraction form
    255,431.47/352,453.20 = 154,829.47/x
  3. Step 3: Cross multiply
    255,431.47x = 352,453.20 × 154,829.47
  4. Step 4: Simplify right side
    255,431.47x = 54,570,142,155.80
  5. Step 5: Solve for x
    x = 54,570,142,155.80/255,431.47
  6. Step 6: Final answer
    x = 213,639.07

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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.