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Finding the Fourth Proportional to 667,068.72, 920,547.64 and 361,139.46

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Solution

The fourth proportional to 667,068.72, 920,547.64 and 361,139.46 is: 498,368.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,068.72 : 920,547.64 = 361,139.46 : x
  2. Step 2: Convert to fraction form
    667,068.72/920,547.64 = 361,139.46/x
  3. Step 3: Cross multiply
    667,068.72x = 920,547.64 × 361,139.46
  4. Step 4: Simplify right side
    667,068.72x = 332,446,077,759.92
  5. Step 5: Solve for x
    x = 332,446,077,759.92/667,068.72
  6. Step 6: Final answer
    x = 498,368.56

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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.