Home / 661,511.40-991,018.42-390,831.84

Finding the Fourth Proportional to 661,511.40, 991,018.42 and 390,831.84

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Solution

The fourth proportional to 661,511.40, 991,018.42 and 390,831.84 is: 585,510.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,511.40 : 991,018.42 = 390,831.84 : x
  2. Step 2: Convert to fraction form
    661,511.40/991,018.42 = 390,831.84/x
  3. Step 3: Cross multiply
    661,511.40x = 991,018.42 × 390,831.84
  4. Step 4: Simplify right side
    661,511.40x = 387,321,552,562.49
  5. Step 5: Solve for x
    x = 387,321,552,562.49/661,511.40
  6. Step 6: Final answer
    x = 585,510.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.