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Finding the Fourth Proportional to 716,276.94, 988,441.53 and 393,987.02

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Solution

The fourth proportional to 716,276.94, 988,441.53 and 393,987.02 is: 543,690.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,276.94 : 988,441.53 = 393,987.02 : x
  2. Step 2: Convert to fraction form
    716,276.94/988,441.53 = 393,987.02/x
  3. Step 3: Cross multiply
    716,276.94x = 988,441.53 × 393,987.02
  4. Step 4: Simplify right side
    716,276.94x = 389,433,127,906.73
  5. Step 5: Solve for x
    x = 389,433,127,906.73/716,276.94
  6. Step 6: Final answer
    x = 543,690.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.