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Finding the Fourth Proportional to 570,074.61, 855,362.24 and 215,005.65

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Solution

The fourth proportional to 570,074.61, 855,362.24 and 215,005.65 is: 322,602.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,074.61 : 855,362.24 = 215,005.65 : x
  2. Step 2: Convert to fraction form
    570,074.61/855,362.24 = 215,005.65/x
  3. Step 3: Cross multiply
    570,074.61x = 855,362.24 × 215,005.65
  4. Step 4: Simplify right side
    570,074.61x = 183,907,714,396.66
  5. Step 5: Solve for x
    x = 183,907,714,396.66/570,074.61
  6. Step 6: Final answer
    x = 322,602.89

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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.