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Finding the Fourth Proportional to 714,641.22, 986,131.53 and 428,153.94

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Solution

The fourth proportional to 714,641.22, 986,131.53 and 428,153.94 is: 590,808.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,641.22 : 986,131.53 = 428,153.94 : x
  2. Step 2: Convert to fraction form
    714,641.22/986,131.53 = 428,153.94/x
  3. Step 3: Cross multiply
    714,641.22x = 986,131.53 × 428,153.94
  4. Step 4: Simplify right side
    714,641.22x = 422,216,099,927.73
  5. Step 5: Solve for x
    x = 422,216,099,927.73/714,641.22
  6. Step 6: Final answer
    x = 590,808.49

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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.