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Finding the Fourth Proportional to 720,129, 993,778.02 and 418,342.44

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Solution

The fourth proportional to 720,129, 993,778.02 and 418,342.44 is: 577,312.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,129 : 993,778.02 = 418,342.44 : x
  2. Step 2: Convert to fraction form
    720,129/993,778.02 = 418,342.44/x
  3. Step 3: Cross multiply
    720,129x = 993,778.02 × 418,342.44
  4. Step 4: Simplify right side
    720,129x = 415,739,521,705.17
  5. Step 5: Solve for x
    x = 415,739,521,705.17/720,129
  6. Step 6: Final answer
    x = 577,312.57

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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.