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Finding the Fourth Proportional to 506,831.80, 699,429.18 and 280,485.40

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Solution

The fourth proportional to 506,831.80, 699,429.18 and 280,485.40 is: 387,070.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    506,831.80 : 699,429.18 = 280,485.40 : x
  2. Step 2: Convert to fraction form
    506,831.80/699,429.18 = 280,485.40/x
  3. Step 3: Cross multiply
    506,831.80x = 699,429.18 × 280,485.40
  4. Step 4: Simplify right side
    506,831.80x = 196,179,673,323.97
  5. Step 5: Solve for x
    x = 196,179,673,323.97/506,831.80
  6. Step 6: Final answer
    x = 387,070.57

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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.