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Finding the Fourth Proportional to 520,463.40, 780,695.36 and 146,486.40

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Solution

The fourth proportional to 520,463.40, 780,695.36 and 146,486.40 is: 219,729.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,463.40 : 780,695.36 = 146,486.40 : x
  2. Step 2: Convert to fraction form
    520,463.40/780,695.36 = 146,486.40/x
  3. Step 3: Cross multiply
    520,463.40x = 780,695.36 × 146,486.40
  4. Step 4: Simplify right side
    520,463.40x = 114,361,252,783.10
  5. Step 5: Solve for x
    x = 114,361,252,783.10/520,463.40
  6. Step 6: Final answer
    x = 219,729.67

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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.