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Finding the Fourth Proportional to 357,687.20, 535,916.40 and 170,295.20

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Solution

The fourth proportional to 357,687.20, 535,916.40 and 170,295.20 is: 255,150.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,687.20 : 535,916.40 = 170,295.20 : x
  2. Step 2: Convert to fraction form
    357,687.20/535,916.40 = 170,295.20/x
  3. Step 3: Cross multiply
    357,687.20x = 535,916.40 × 170,295.20
  4. Step 4: Simplify right side
    357,687.20x = 91,263,990,521.28
  5. Step 5: Solve for x
    x = 91,263,990,521.28/357,687.20
  6. Step 6: Final answer
    x = 255,150.28

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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.