Home / 378,895.40-522,880.02-209,129.66

Finding the Fourth Proportional to 378,895.40, 522,880.02 and 209,129.66

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Solution

The fourth proportional to 378,895.40, 522,880.02 and 209,129.66 is: 288,601.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,895.40 : 522,880.02 = 209,129.66 : x
  2. Step 2: Convert to fraction form
    378,895.40/522,880.02 = 209,129.66/x
  3. Step 3: Cross multiply
    378,895.40x = 522,880.02 × 209,129.66
  4. Step 4: Simplify right side
    378,895.40x = 109,349,720,803.39
  5. Step 5: Solve for x
    x = 109,349,720,803.39/378,895.40
  6. Step 6: Final answer
    x = 288,601.34

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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.