Home / 642,254.45-886,719.53-400,891.66

Finding the Fourth Proportional to 642,254.45, 886,719.53 and 400,891.66

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Solution

The fourth proportional to 642,254.45, 886,719.53 and 400,891.66 is: 553,485.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,254.45 : 886,719.53 = 400,891.66 : x
  2. Step 2: Convert to fraction form
    642,254.45/886,719.53 = 400,891.66/x
  3. Step 3: Cross multiply
    642,254.45x = 886,719.53 × 400,891.66
  4. Step 4: Simplify right side
    642,254.45x = 355,478,463,121.55
  5. Step 5: Solve for x
    x = 355,478,463,121.55/642,254.45
  6. Step 6: Final answer
    x = 553,485.41

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1.5x scale

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.