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Finding the Fourth Proportional to 1,405,644.76, 1,939,789.38 and 761,070.52

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Solution

The fourth proportional to 1,405,644.76, 1,939,789.38 and 761,070.52 is: 1,050,277.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405,644.76 : 1,939,789.38 = 761,070.52 : x
  2. Step 2: Convert to fraction form
    1,405,644.76/1,939,789.38 = 761,070.52/x
  3. Step 3: Cross multiply
    1,405,644.76x = 1,939,789.38 × 761,070.52
  4. Step 4: Simplify right side
    1,405,644.76x = 1,476,316,512,127.08
  5. Step 5: Solve for x
    x = 1,476,316,512,127.08/1,405,644.76
  6. Step 6: Final answer
    x = 1,050,277.11

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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.