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Finding the Fourth Proportional to 613,076.68, 918,419.28 and 346,029.40

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Solution

The fourth proportional to 613,076.68, 918,419.28 and 346,029.40 is: 518,369.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,076.68 : 918,419.28 = 346,029.40 : x
  2. Step 2: Convert to fraction form
    613,076.68/918,419.28 = 346,029.40/x
  3. Step 3: Cross multiply
    613,076.68x = 918,419.28 × 346,029.40
  4. Step 4: Simplify right side
    613,076.68x = 317,800,072,406.83
  5. Step 5: Solve for x
    x = 317,800,072,406.83/613,076.68
  6. Step 6: Final answer
    x = 518,369.21

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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.