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Finding the Fourth Proportional to 296,987.80, 445,583.70 and 86,656.60

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Solution

The fourth proportional to 296,987.80, 445,583.70 and 86,656.60 is: 130,014.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,987.80 : 445,583.70 = 86,656.60 : x
  2. Step 2: Convert to fraction form
    296,987.80/445,583.70 = 86,656.60/x
  3. Step 3: Cross multiply
    296,987.80x = 445,583.70 × 86,656.60
  4. Step 4: Simplify right side
    296,987.80x = 38,612,768,457.42
  5. Step 5: Solve for x
    x = 38,612,768,457.42/296,987.80
  6. Step 6: Final answer
    x = 130,014.66

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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.