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Finding the Fourth Proportional to 502,376.81, 693,278.88 and 287,521.07

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Solution

The fourth proportional to 502,376.81, 693,278.88 and 287,521.07 is: 396,778.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,376.81 : 693,278.88 = 287,521.07 : x
  2. Step 2: Convert to fraction form
    502,376.81/693,278.88 = 287,521.07/x
  3. Step 3: Cross multiply
    502,376.81x = 693,278.88 × 287,521.07
  4. Step 4: Simplify right side
    502,376.81x = 199,332,285,386.00
  5. Step 5: Solve for x
    x = 199,332,285,386.00/502,376.81
  6. Step 6: Final answer
    x = 396,778.44

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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.