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Finding the Fourth Proportional to 537,297.96, 740,768.40 and 389,990.40

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Solution

The fourth proportional to 537,297.96, 740,768.40 and 389,990.40 is: 537,676.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    537,297.96 : 740,768.40 = 389,990.40 : x
  2. Step 2: Convert to fraction form
    537,297.96/740,768.40 = 389,990.40/x
  3. Step 3: Cross multiply
    537,297.96x = 740,768.40 × 389,990.40
  4. Step 4: Simplify right side
    537,297.96x = 288,892,564,623.36
  5. Step 5: Solve for x
    x = 288,892,564,623.36/537,297.96
  6. Step 6: Final answer
    x = 537,676.65

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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.