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Finding the Fourth Proportional to 707,890, 976,896.78 and 385,602.76

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Solution

The fourth proportional to 707,890, 976,896.78 and 385,602.76 is: 532,136.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,890 : 976,896.78 = 385,602.76 : x
  2. Step 2: Convert to fraction form
    707,890/976,896.78 = 385,602.76/x
  3. Step 3: Cross multiply
    707,890x = 976,896.78 × 385,602.76
  4. Step 4: Simplify right side
    707,890x = 376,694,094,603.11
  5. Step 5: Solve for x
    x = 376,694,094,603.11/707,890
  6. Step 6: Final answer
    x = 532,136.48

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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.