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Finding the Fourth Proportional to 390,571.08, 539,015.22 and 218,545.71

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Solution

The fourth proportional to 390,571.08, 539,015.22 and 218,545.71 is: 301,608.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,571.08 : 539,015.22 = 218,545.71 : x
  2. Step 2: Convert to fraction form
    390,571.08/539,015.22 = 218,545.71/x
  3. Step 3: Cross multiply
    390,571.08x = 539,015.22 × 218,545.71
  4. Step 4: Simplify right side
    390,571.08x = 117,799,463,955.71
  5. Step 5: Solve for x
    x = 117,799,463,955.71/390,571.08
  6. Step 6: Final answer
    x = 301,608.26

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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.