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Finding the Fourth Proportional to 718,156.78, 989,713.83 and 536,548.30

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Solution

The fourth proportional to 718,156.78, 989,713.83 and 536,548.30 is: 739,433.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,156.78 : 989,713.83 = 536,548.30 : x
  2. Step 2: Convert to fraction form
    718,156.78/989,713.83 = 536,548.30/x
  3. Step 3: Cross multiply
    718,156.78x = 989,713.83 × 536,548.30
  4. Step 4: Simplify right side
    718,156.78x = 531,029,272,972.99
  5. Step 5: Solve for x
    x = 531,029,272,972.99/718,156.78
  6. Step 6: Final answer
    x = 739,433.63

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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.