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Finding the Fourth Proportional to 630,981.91, 870,831.44 and 359,115.94

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Solution

The fourth proportional to 630,981.91, 870,831.44 and 359,115.94 is: 495,623.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,981.91 : 870,831.44 = 359,115.94 : x
  2. Step 2: Convert to fraction form
    630,981.91/870,831.44 = 359,115.94/x
  3. Step 3: Cross multiply
    630,981.91x = 870,831.44 × 359,115.94
  4. Step 4: Simplify right side
    630,981.91x = 312,729,449,361.57
  5. Step 5: Solve for x
    x = 312,729,449,361.57/630,981.91
  6. Step 6: Final answer
    x = 495,623.48

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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.