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Finding the Fourth Proportional to 520,539.06, 718,330.41 and 287,974.58

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Solution

The fourth proportional to 520,539.06, 718,330.41 and 287,974.58 is: 397,397.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,539.06 : 718,330.41 = 287,974.58 : x
  2. Step 2: Convert to fraction form
    520,539.06/718,330.41 = 287,974.58/x
  3. Step 3: Cross multiply
    520,539.06x = 718,330.41 × 287,974.58
  4. Step 4: Simplify right side
    520,539.06x = 206,860,899,916.80
  5. Step 5: Solve for x
    x = 206,860,899,916.80/520,539.06
  6. Step 6: Final answer
    x = 397,397.46

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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.