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Finding the Fourth Proportional to 687,410.88, 948,670.56 and 385,624.32

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Solution

The fourth proportional to 687,410.88, 948,670.56 and 385,624.32 is: 532,185.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,410.88 : 948,670.56 = 385,624.32 : x
  2. Step 2: Convert to fraction form
    687,410.88/948,670.56 = 385,624.32/x
  3. Step 3: Cross multiply
    687,410.88x = 948,670.56 × 385,624.32
  4. Step 4: Simplify right side
    687,410.88x = 365,830,439,604.02
  5. Step 5: Solve for x
    x = 365,830,439,604.02/687,410.88
  6. Step 6: Final answer
    x = 532,185.99

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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.