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Finding the Fourth Proportional to 618,943.72, 854,178.42 and 346,998.28

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Solution

The fourth proportional to 618,943.72, 854,178.42 and 346,998.28 is: 478,877.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,943.72 : 854,178.42 = 346,998.28 : x
  2. Step 2: Convert to fraction form
    618,943.72/854,178.42 = 346,998.28/x
  3. Step 3: Cross multiply
    618,943.72x = 854,178.42 × 346,998.28
  4. Step 4: Simplify right side
    618,943.72x = 296,398,442,553.12
  5. Step 5: Solve for x
    x = 296,398,442,553.12/618,943.72
  6. Step 6: Final answer
    x = 478,877.86

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1.5x scale

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.