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Finding the Fourth Proportional to 545,713, 818,989.80 and 439,357.16

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Solution

The fourth proportional to 545,713, 818,989.80 and 439,357.16 is: 659,374.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,713 : 818,989.80 = 439,357.16 : x
  2. Step 2: Convert to fraction form
    545,713/818,989.80 = 439,357.16/x
  3. Step 3: Cross multiply
    545,713x = 818,989.80 × 439,357.16
  4. Step 4: Simplify right side
    545,713x = 359,829,032,596.97
  5. Step 5: Solve for x
    x = 359,829,032,596.97/545,713
  6. Step 6: Final answer
    x = 659,374.13

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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.