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Finding the Fourth Proportional to 618,369.32, 853,374.14 and 346,439.45

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Solution

The fourth proportional to 618,369.32, 853,374.14 and 346,439.45 is: 478,100.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,369.32 : 853,374.14 = 346,439.45 : x
  2. Step 2: Convert to fraction form
    618,369.32/853,374.14 = 346,439.45/x
  3. Step 3: Cross multiply
    618,369.32x = 853,374.14 × 346,439.45
  4. Step 4: Simplify right side
    618,369.32x = 295,642,467,705.82
  5. Step 5: Solve for x
    x = 295,642,467,705.82/618,369.32
  6. Step 6: Final answer
    x = 478,100.15

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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.