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Finding the Fourth Proportional to 1,279,966.78, 1,766,320.41 and 706,994.65

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Solution

The fourth proportional to 1,279,966.78, 1,766,320.41 and 706,994.65 is: 975,633.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,966.78 : 1,766,320.41 = 706,994.65 : x
  2. Step 2: Convert to fraction form
    1,279,966.78/1,766,320.41 = 706,994.65/x
  3. Step 3: Cross multiply
    1,279,966.78x = 1,766,320.41 × 706,994.65
  4. Step 4: Simplify right side
    1,279,966.78x = 1,248,779,080,055.81
  5. Step 5: Solve for x
    x = 1,248,779,080,055.81/1,279,966.78
  6. Step 6: Final answer
    x = 975,633.98

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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.