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Finding the Fourth Proportional to 255,646.95, 352,819.04 and 153,705.62

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Solution

The fourth proportional to 255,646.95, 352,819.04 and 153,705.62 is: 212,129.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,646.95 : 352,819.04 = 153,705.62 : x
  2. Step 2: Convert to fraction form
    255,646.95/352,819.04 = 153,705.62/x
  3. Step 3: Cross multiply
    255,646.95x = 352,819.04 × 153,705.62
  4. Step 4: Simplify right side
    255,646.95x = 54,230,266,758.38
  5. Step 5: Solve for x
    x = 54,230,266,758.38/255,646.95
  6. Step 6: Final answer
    x = 212,129.53

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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.