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Finding the Fourth Proportional to 320,051.61, 480,378.74 and 162,393.21

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Solution

The fourth proportional to 320,051.61, 480,378.74 and 162,393.21 is: 243,742.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,051.61 : 480,378.74 = 162,393.21 : x
  2. Step 2: Convert to fraction form
    320,051.61/480,378.74 = 162,393.21/x
  3. Step 3: Cross multiply
    320,051.61x = 480,378.74 × 162,393.21
  4. Step 4: Simplify right side
    320,051.61x = 78,010,244,792.39
  5. Step 5: Solve for x
    x = 78,010,244,792.39/320,051.61
  6. Step 6: Final answer
    x = 243,742.70

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1.5x scale

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.