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Finding the Fourth Proportional to 320,118.66, 480,307.08 and 142,504.20

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Solution

The fourth proportional to 320,118.66, 480,307.08 and 142,504.20 is: 213,813.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,118.66 : 480,307.08 = 142,504.20 : x
  2. Step 2: Convert to fraction form
    320,118.66/480,307.08 = 142,504.20/x
  3. Step 3: Cross multiply
    320,118.66x = 480,307.08 × 142,504.20
  4. Step 4: Simplify right side
    320,118.66x = 68,445,776,189.74
  5. Step 5: Solve for x
    x = 68,445,776,189.74/320,118.66
  6. Step 6: Final answer
    x = 213,813.77

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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.