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Finding the Fourth Proportional to 777,789, 1,073,349.54 and 420,093

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Solution

The fourth proportional to 777,789, 1,073,349.54 and 420,093 is: 579,728.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,789 : 1,073,349.54 = 420,093 : x
  2. Step 2: Convert to fraction form
    777,789/1,073,349.54 = 420,093/x
  3. Step 3: Cross multiply
    777,789x = 1,073,349.54 × 420,093
  4. Step 4: Simplify right side
    777,789x = 450,906,628,307.22
  5. Step 5: Solve for x
    x = 450,906,628,307.22/777,789
  6. Step 6: Final answer
    x = 579,728.73

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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.