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Finding the Fourth Proportional to 407,709.60, 611,345.70 and 170,784.60

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Solution

The fourth proportional to 407,709.60, 611,345.70 and 170,784.60 is: 256,085.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,709.60 : 611,345.70 = 170,784.60 : x
  2. Step 2: Convert to fraction form
    407,709.60/611,345.70 = 170,784.60/x
  3. Step 3: Cross multiply
    407,709.60x = 611,345.70 × 170,784.60
  4. Step 4: Simplify right side
    407,709.60x = 104,408,430,836.22
  5. Step 5: Solve for x
    x = 104,408,430,836.22/407,709.60
  6. Step 6: Final answer
    x = 256,085.29

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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.