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Finding the Fourth Proportional to 268,985.60, 403,478.40 and 71,993.60

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Solution

The fourth proportional to 268,985.60, 403,478.40 and 71,993.60 is: 107,990.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,985.60 : 403,478.40 = 71,993.60 : x
  2. Step 2: Convert to fraction form
    268,985.60/403,478.40 = 71,993.60/x
  3. Step 3: Cross multiply
    268,985.60x = 403,478.40 × 71,993.60
  4. Step 4: Simplify right side
    268,985.60x = 29,047,862,538.24
  5. Step 5: Solve for x
    x = 29,047,862,538.24/268,985.60
  6. Step 6: Final answer
    x = 107,990.40

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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.