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Finding the Fourth Proportional to 1,290,964.98, 1,934,675.90 and 816,801.52

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Solution

The fourth proportional to 1,290,964.98, 1,934,675.90 and 816,801.52 is: 1,224,081.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,964.98 : 1,934,675.90 = 816,801.52 : x
  2. Step 2: Convert to fraction form
    1,290,964.98/1,934,675.90 = 816,801.52/x
  3. Step 3: Cross multiply
    1,290,964.98x = 1,934,675.90 × 816,801.52
  4. Step 4: Simplify right side
    1,290,964.98x = 1,580,246,215,827.37
  5. Step 5: Solve for x
    x = 1,580,246,215,827.37/1,290,964.98
  6. Step 6: Final answer
    x = 1,224,081.40

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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.