Home / 916,720.40-1,374,619.28-317,520.68

Finding the Fourth Proportional to 916,720.40, 1,374,619.28 and 317,520.68

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Solution

The fourth proportional to 916,720.40, 1,374,619.28 and 317,520.68 is: 476,121.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,720.40 : 1,374,619.28 = 317,520.68 : x
  2. Step 2: Convert to fraction form
    916,720.40/1,374,619.28 = 317,520.68/x
  3. Step 3: Cross multiply
    916,720.40x = 1,374,619.28 × 317,520.68
  4. Step 4: Simplify right side
    916,720.40x = 436,470,040,066.01
  5. Step 5: Solve for x
    x = 436,470,040,066.01/916,720.40
  6. Step 6: Final answer
    x = 476,121.22

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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.