Home / 390,724.36-539,199.66-211,876.36

Finding the Fourth Proportional to 390,724.36, 539,199.66 and 211,876.36

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Solution

The fourth proportional to 390,724.36, 539,199.66 and 211,876.36 is: 292,389.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,724.36 : 539,199.66 = 211,876.36 : x
  2. Step 2: Convert to fraction form
    390,724.36/539,199.66 = 211,876.36/x
  3. Step 3: Cross multiply
    390,724.36x = 539,199.66 × 211,876.36
  4. Step 4: Simplify right side
    390,724.36x = 114,243,661,274.04
  5. Step 5: Solve for x
    x = 114,243,661,274.04/390,724.36
  6. Step 6: Final answer
    x = 292,389.40

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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.