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Finding the Fourth Proportional to 660,625.72, 990,959.15 and 314,333.32

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Solution

The fourth proportional to 660,625.72, 990,959.15 and 314,333.32 is: 471,509.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,625.72 : 990,959.15 = 314,333.32 : x
  2. Step 2: Convert to fraction form
    660,625.72/990,959.15 = 314,333.32/x
  3. Step 3: Cross multiply
    660,625.72x = 990,959.15 × 314,333.32
  4. Step 4: Simplify right side
    660,625.72x = 311,491,479,603.88
  5. Step 5: Solve for x
    x = 311,491,479,603.88/660,625.72
  6. Step 6: Final answer
    x = 471,509.77

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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.