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Finding the Fourth Proportional to 380,012.80, 569,662.80 and 143,514.40

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Solution

The fourth proportional to 380,012.80, 569,662.80 and 143,514.40 is: 215,137.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,012.80 : 569,662.80 = 143,514.40 : x
  2. Step 2: Convert to fraction form
    380,012.80/569,662.80 = 143,514.40/x
  3. Step 3: Cross multiply
    380,012.80x = 569,662.80 × 143,514.40
  4. Step 4: Simplify right side
    380,012.80x = 81,754,814,944.32
  5. Step 5: Solve for x
    x = 81,754,814,944.32/380,012.80
  6. Step 6: Final answer
    x = 215,137.00

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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.