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Finding the Fourth Proportional to 2,154,689.72, 2,973,480.82 and 1,187,798.79

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Solution

The fourth proportional to 2,154,689.72, 2,973,480.82 and 1,187,798.79 is: 1,639,167.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154,689.72 : 2,973,480.82 = 1,187,798.79 : x
  2. Step 2: Convert to fraction form
    2,154,689.72/2,973,480.82 = 1,187,798.79/x
  3. Step 3: Cross multiply
    2,154,689.72x = 2,973,480.82 × 1,187,798.79
  4. Step 4: Simplify right side
    2,154,689.72x = 3,531,896,924,548.41
  5. Step 5: Solve for x
    x = 3,531,896,924,548.41/2,154,689.72
  6. Step 6: Final answer
    x = 1,639,167.30

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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.