Home / 817,690.57-1,128,401.50-455,114.53

Finding the Fourth Proportional to 817,690.57, 1,128,401.50 and 455,114.53

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Solution

The fourth proportional to 817,690.57, 1,128,401.50 and 455,114.53 is: 628,051.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,690.57 : 1,128,401.50 = 455,114.53 : x
  2. Step 2: Convert to fraction form
    817,690.57/1,128,401.50 = 455,114.53/x
  3. Step 3: Cross multiply
    817,690.57x = 1,128,401.50 × 455,114.53
  4. Step 4: Simplify right side
    817,690.57x = 513,551,918,323.80
  5. Step 5: Solve for x
    x = 513,551,918,323.80/817,690.57
  6. Step 6: Final answer
    x = 628,051.66

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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.