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Finding the Fourth Proportional to 520,081.45, 717,710.30 and 290,638.67

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Solution

The fourth proportional to 520,081.45, 717,710.30 and 290,638.67 is: 401,080.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,081.45 : 717,710.30 = 290,638.67 : x
  2. Step 2: Convert to fraction form
    520,081.45/717,710.30 = 290,638.67/x
  3. Step 3: Cross multiply
    520,081.45x = 717,710.30 × 290,638.67
  4. Step 4: Simplify right side
    520,081.45x = 208,594,367,378.38
  5. Step 5: Solve for x
    x = 208,594,367,378.38/520,081.45
  6. Step 6: Final answer
    x = 401,080.19

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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.