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Finding the Fourth Proportional to 520,221.76, 780,332.64 and 146,244.80

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Solution

The fourth proportional to 520,221.76, 780,332.64 and 146,244.80 is: 219,367.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,221.76 : 780,332.64 = 146,244.80 : x
  2. Step 2: Convert to fraction form
    520,221.76/780,332.64 = 146,244.80/x
  3. Step 3: Cross multiply
    520,221.76x = 780,332.64 × 146,244.80
  4. Step 4: Simplify right side
    520,221.76x = 114,119,590,870.27
  5. Step 5: Solve for x
    x = 114,119,590,870.27/520,221.76
  6. Step 6: Final answer
    x = 219,367.20

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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.