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Finding the Fourth Proportional to 570,659.60, 855,665.40 and 215,685.20

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Solution

The fourth proportional to 570,659.60, 855,665.40 and 215,685.20 is: 323,405.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,659.60 : 855,665.40 = 215,685.20 : x
  2. Step 2: Convert to fraction form
    570,659.60/855,665.40 = 215,685.20/x
  3. Step 3: Cross multiply
    570,659.60x = 855,665.40 × 215,685.20
  4. Step 4: Simplify right side
    570,659.60x = 184,554,362,932.08
  5. Step 5: Solve for x
    x = 184,554,362,932.08/570,659.60
  6. Step 6: Final answer
    x = 323,405.34

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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.