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Finding the Fourth Proportional to 347,307.20, 520,831.20 and 136,901.60

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Solution

The fourth proportional to 347,307.20, 520,831.20 and 136,901.60 is: 205,301.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,307.20 : 520,831.20 = 136,901.60 : x
  2. Step 2: Convert to fraction form
    347,307.20/520,831.20 = 136,901.60/x
  3. Step 3: Cross multiply
    347,307.20x = 520,831.20 × 136,901.60
  4. Step 4: Simplify right side
    347,307.20x = 71,302,624,609.92
  5. Step 5: Solve for x
    x = 71,302,624,609.92/347,307.20
  6. Step 6: Final answer
    x = 205,301.31

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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.