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Finding the Fourth Proportional to 545,681.70, 818,522.55 and 521,187.30

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Solution

The fourth proportional to 545,681.70, 818,522.55 and 521,187.30 is: 781,780.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,681.70 : 818,522.55 = 521,187.30 : x
  2. Step 2: Convert to fraction form
    545,681.70/818,522.55 = 521,187.30/x
  3. Step 3: Cross multiply
    545,681.70x = 818,522.55 × 521,187.30
  4. Step 4: Simplify right side
    545,681.70x = 426,603,557,823.62
  5. Step 5: Solve for x
    x = 426,603,557,823.62/545,681.70
  6. Step 6: Final answer
    x = 781,780.95

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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.