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Finding the Fourth Proportional to 687,172.88, 948,296.76 and 385,373.36

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Solution

The fourth proportional to 687,172.88, 948,296.76 and 385,373.36 is: 531,814.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,172.88 : 948,296.76 = 385,373.36 : x
  2. Step 2: Convert to fraction form
    687,172.88/948,296.76 = 385,373.36/x
  3. Step 3: Cross multiply
    687,172.88x = 948,296.76 × 385,373.36
  4. Step 4: Simplify right side
    687,172.88x = 365,448,308,678.31
  5. Step 5: Solve for x
    x = 365,448,308,678.31/687,172.88
  6. Step 6: Final answer
    x = 531,814.22

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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.