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Finding the Fourth Proportional to 385,597.80, 578,051.10 and 343,607.40

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Solution

The fourth proportional to 385,597.80, 578,051.10 and 343,607.40 is: 515,103.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,597.80 : 578,051.10 = 343,607.40 : x
  2. Step 2: Convert to fraction form
    385,597.80/578,051.10 = 343,607.40/x
  3. Step 3: Cross multiply
    385,597.80x = 578,051.10 × 343,607.40
  4. Step 4: Simplify right side
    385,597.80x = 198,622,635,538.14
  5. Step 5: Solve for x
    x = 198,622,635,538.14/385,597.80
  6. Step 6: Final answer
    x = 515,103.13

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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.