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Finding the Fourth Proportional to 261,390.50, 360,663.24 and 153,921.32

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Solution

The fourth proportional to 261,390.50, 360,663.24 and 153,921.32 is: 212,378.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,390.50 : 360,663.24 = 153,921.32 : x
  2. Step 2: Convert to fraction form
    261,390.50/360,663.24 = 153,921.32/x
  3. Step 3: Cross multiply
    261,390.50x = 360,663.24 × 153,921.32
  4. Step 4: Simplify right side
    261,390.50x = 55,513,761,976.28
  5. Step 5: Solve for x
    x = 55,513,761,976.28/261,390.50
  6. Step 6: Final answer
    x = 212,378.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.