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Finding the Fourth Proportional to 626,811.60, 940,831.80 and 311,624.40

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Solution

The fourth proportional to 626,811.60, 940,831.80 and 311,624.40 is: 467,742.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,811.60 : 940,831.80 = 311,624.40 : x
  2. Step 2: Convert to fraction form
    626,811.60/940,831.80 = 311,624.40/x
  3. Step 3: Cross multiply
    626,811.60x = 940,831.80 × 311,624.40
  4. Step 4: Simplify right side
    626,811.60x = 293,186,145,175.92
  5. Step 5: Solve for x
    x = 293,186,145,175.92/626,811.60
  6. Step 6: Final answer
    x = 467,742.05

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1.5x scale

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.