Home / 1,187,140.12-1,638,333.72-670,714.88

Finding the Fourth Proportional to 1,187,140.12, 1,638,333.72 and 670,714.88

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Solution

The fourth proportional to 1,187,140.12, 1,638,333.72 and 670,714.88 is: 925,631.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,140.12 : 1,638,333.72 = 670,714.88 : x
  2. Step 2: Convert to fraction form
    1,187,140.12/1,638,333.72 = 670,714.88/x
  3. Step 3: Cross multiply
    1,187,140.12x = 1,638,333.72 × 670,714.88
  4. Step 4: Simplify right side
    1,187,140.12x = 1,098,854,804,409.75
  5. Step 5: Solve for x
    x = 1,098,854,804,409.75/1,187,140.12
  6. Step 6: Final answer
    x = 925,631.93

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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.