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Finding the Fourth Proportional to 320,641.41, 480,961.65 and 128,602.47

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Solution

The fourth proportional to 320,641.41, 480,961.65 and 128,602.47 is: 192,903.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,641.41 : 480,961.65 = 128,602.47 : x
  2. Step 2: Convert to fraction form
    320,641.41/480,961.65 = 128,602.47/x
  3. Step 3: Cross multiply
    320,641.41x = 480,961.65 × 128,602.47
  4. Step 4: Simplify right side
    320,641.41x = 61,852,856,165.28
  5. Step 5: Solve for x
    x = 61,852,856,165.28/320,641.41
  6. Step 6: Final answer
    x = 192,903.52

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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.