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Finding the Fourth Proportional to 666,889.75, 920,307.90 and 365,083.75

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Solution

The fourth proportional to 666,889.75, 920,307.90 and 365,083.75 is: 503,815.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,889.75 : 920,307.90 = 365,083.75 : x
  2. Step 2: Convert to fraction form
    666,889.75/920,307.90 = 365,083.75/x
  3. Step 3: Cross multiply
    666,889.75x = 920,307.90 × 365,083.75
  4. Step 4: Simplify right side
    666,889.75x = 335,989,459,286.63
  5. Step 5: Solve for x
    x = 335,989,459,286.63/666,889.75
  6. Step 6: Final answer
    x = 503,815.60

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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.