Home / 390,831.84-539,360.16-221,062.56

Finding the Fourth Proportional to 390,831.84, 539,360.16 and 221,062.56

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Solution

The fourth proportional to 390,831.84, 539,360.16 and 221,062.56 is: 305,073.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,831.84 : 539,360.16 = 221,062.56 : x
  2. Step 2: Convert to fraction form
    390,831.84/539,360.16 = 221,062.56/x
  3. Step 3: Cross multiply
    390,831.84x = 539,360.16 × 221,062.56
  4. Step 4: Simplify right side
    390,831.84x = 119,232,337,731.61
  5. Step 5: Solve for x
    x = 119,232,337,731.61/390,831.84
  6. Step 6: Final answer
    x = 305,073.25

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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.