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Finding the Fourth Proportional to 720,053.88, 993,795.66 and 418,422.84

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Solution

The fourth proportional to 720,053.88, 993,795.66 and 418,422.84 is: 577,494.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,053.88 : 993,795.66 = 418,422.84 : x
  2. Step 2: Convert to fraction form
    720,053.88/993,795.66 = 418,422.84/x
  3. Step 3: Cross multiply
    720,053.88x = 993,795.66 × 418,422.84
  4. Step 4: Simplify right side
    720,053.88x = 415,826,802,436.87
  5. Step 5: Solve for x
    x = 415,826,802,436.87/720,053.88
  6. Step 6: Final answer
    x = 577,494.01

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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.