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Finding the Fourth Proportional to 320,438.16, 482,820.48 and 265,500.72

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Solution

The fourth proportional to 320,438.16, 482,820.48 and 265,500.72 is: 400,043.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,438.16 : 482,820.48 = 265,500.72 : x
  2. Step 2: Convert to fraction form
    320,438.16/482,820.48 = 265,500.72/x
  3. Step 3: Cross multiply
    320,438.16x = 482,820.48 × 265,500.72
  4. Step 4: Simplify right side
    320,438.16x = 128,189,185,070.75
  5. Step 5: Solve for x
    x = 128,189,185,070.75/320,438.16
  6. Step 6: Final answer
    x = 400,043.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.