Home / 390,533,659.59-538,900,831.44-231,736,420.65

Finding the Fourth Proportional to 390,533,659.59, 538,900,831.44 and 231,736,420.65

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Solution

The fourth proportional to 390,533,659.59, 538,900,831.44 and 231,736,420.65 is: 319,775,124.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,533,659.59 : 538,900,831.44 = 231,736,420.65 : x
  2. Step 2: Convert to fraction form
    390,533,659.59/538,900,831.44 = 231,736,420.65/x
  3. Step 3: Cross multiply
    390,533,659.59x = 538,900,831.44 × 231,736,420.65
  4. Step 4: Simplify right side
    390,533,659.59x = 124,882,949,763,214,608
  5. Step 5: Solve for x
    x = 124,882,949,763,214,608/390,533,659.59
  6. Step 6: Final answer
    x = 319,775,124.87

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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.