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Finding the Fourth Proportional to 1,290,385.48, 1,934,143.98 and 973,815.88

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Solution

The fourth proportional to 1,290,385.48, 1,934,143.98 and 973,815.88 is: 1,459,641.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,385.48 : 1,934,143.98 = 973,815.88 : x
  2. Step 2: Convert to fraction form
    1,290,385.48/1,934,143.98 = 973,815.88/x
  3. Step 3: Cross multiply
    1,290,385.48x = 1,934,143.98 × 973,815.88
  4. Step 4: Simplify right side
    1,290,385.48x = 1,883,500,121,930.40
  5. Step 5: Solve for x
    x = 1,883,500,121,930.40/1,290,385.48
  6. Step 6: Final answer
    x = 1,459,641.44

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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.