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Finding the Fourth Proportional to 355,921.40, 534,011.70 and 145,710.20

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Solution

The fourth proportional to 355,921.40, 534,011.70 and 145,710.20 is: 218,618.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,921.40 : 534,011.70 = 145,710.20 : x
  2. Step 2: Convert to fraction form
    355,921.40/534,011.70 = 145,710.20/x
  3. Step 3: Cross multiply
    355,921.40x = 534,011.70 × 145,710.20
  4. Step 4: Simplify right side
    355,921.40x = 77,810,951,609.34
  5. Step 5: Solve for x
    x = 77,810,951,609.34/355,921.40
  6. Step 6: Final answer
    x = 218,618.36

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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.