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Finding the Fourth Proportional to 1,668,330.66, 2,502,845.91 and 721,835.94

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Solution

The fourth proportional to 1,668,330.66, 2,502,845.91 and 721,835.94 is: 1,082,905.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,668,330.66 : 2,502,845.91 = 721,835.94 : x
  2. Step 2: Convert to fraction form
    1,668,330.66/2,502,845.91 = 721,835.94/x
  3. Step 3: Cross multiply
    1,668,330.66x = 2,502,845.91 × 721,835.94
  4. Step 4: Simplify right side
    1,668,330.66x = 1,806,644,130,120.01
  5. Step 5: Solve for x
    x = 1,806,644,130,120.01/1,668,330.66
  6. Step 6: Final answer
    x = 1,082,905.31

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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.