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Finding the Fourth Proportional to 618,349.19, 853,739.13 and 386,130.90

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Solution

The fourth proportional to 618,349.19, 853,739.13 and 386,130.90 is: 533,121.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,349.19 : 853,739.13 = 386,130.90 : x
  2. Step 2: Convert to fraction form
    618,349.19/853,739.13 = 386,130.90/x
  3. Step 3: Cross multiply
    618,349.19x = 853,739.13 × 386,130.90
  4. Step 4: Simplify right side
    618,349.19x = 329,655,058,632.12
  5. Step 5: Solve for x
    x = 329,655,058,632.12/618,349.19
  6. Step 6: Final answer
    x = 533,121.20

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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.