Home / 1,187,621.67-1,640,279.93-781,536.40

Finding the Fourth Proportional to 1,187,621.67, 1,640,279.93 and 781,536.40

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Solution

The fourth proportional to 1,187,621.67, 1,640,279.93 and 781,536.40 is: 1,079,416.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,621.67 : 1,640,279.93 = 781,536.40 : x
  2. Step 2: Convert to fraction form
    1,187,621.67/1,640,279.93 = 781,536.40/x
  3. Step 3: Cross multiply
    1,187,621.67x = 1,640,279.93 × 781,536.40
  4. Step 4: Simplify right side
    1,187,621.67x = 1,281,938,471,484.45
  5. Step 5: Solve for x
    x = 1,281,938,471,484.45/1,187,621.67
  6. Step 6: Final answer
    x = 1,079,416.54

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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.