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Finding the Fourth Proportional to 397,817.70, 596,726.55 and 391,256.70

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Solution

The fourth proportional to 397,817.70, 596,726.55 and 391,256.70 is: 586,885.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,817.70 : 596,726.55 = 391,256.70 : x
  2. Step 2: Convert to fraction form
    397,817.70/596,726.55 = 391,256.70/x
  3. Step 3: Cross multiply
    397,817.70x = 596,726.55 × 391,256.70
  4. Step 4: Simplify right side
    397,817.70x = 233,473,260,755.39
  5. Step 5: Solve for x
    x = 233,473,260,755.39/397,817.70
  6. Step 6: Final answer
    x = 586,885.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.