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Finding the Fourth Proportional to 675,831.60, 932,634 and 389,344.32

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Solution

The fourth proportional to 675,831.60, 932,634 and 389,344.32 is: 537,287.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,831.60 : 932,634 = 389,344.32 : x
  2. Step 2: Convert to fraction form
    675,831.60/932,634 = 389,344.32/x
  3. Step 3: Cross multiply
    675,831.60x = 932,634 × 389,344.32
  4. Step 4: Simplify right side
    675,831.60x = 363,115,750,538.88
  5. Step 5: Solve for x
    x = 363,115,750,538.88/675,831.60
  6. Step 6: Final answer
    x = 537,287.32

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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.