Home / 991,718.40-1,487,796.30-317,830.80

Finding the Fourth Proportional to 991,718.40, 1,487,796.30 and 317,830.80

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Solution

The fourth proportional to 991,718.40, 1,487,796.30 and 317,830.80 is: 476,816.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,718.40 : 1,487,796.30 = 317,830.80 : x
  2. Step 2: Convert to fraction form
    991,718.40/1,487,796.30 = 317,830.80/x
  3. Step 3: Cross multiply
    991,718.40x = 1,487,796.30 × 317,830.80
  4. Step 4: Simplify right side
    991,718.40x = 472,867,488,266.04
  5. Step 5: Solve for x
    x = 472,867,488,266.04/991,718.40
  6. Step 6: Final answer
    x = 476,816.29

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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.