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Finding the Fourth Proportional to 520,228.08, 717,990.98 and 305,485.72

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Solution

The fourth proportional to 520,228.08, 717,990.98 and 305,485.72 is: 421,615.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,228.08 : 717,990.98 = 305,485.72 : x
  2. Step 2: Convert to fraction form
    520,228.08/717,990.98 = 305,485.72/x
  3. Step 3: Cross multiply
    520,228.08x = 717,990.98 × 305,485.72
  4. Step 4: Simplify right side
    520,228.08x = 219,335,991,478.81
  5. Step 5: Solve for x
    x = 219,335,991,478.81/520,228.08
  6. Step 6: Final answer
    x = 421,615.06

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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.