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Finding the Fourth Proportional to 660,031.20, 988,297.20 and 520,063.20

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Solution

The fourth proportional to 660,031.20, 988,297.20 and 520,063.20 is: 778,716.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,031.20 : 988,297.20 = 520,063.20 : x
  2. Step 2: Convert to fraction form
    660,031.20/988,297.20 = 520,063.20/x
  3. Step 3: Cross multiply
    660,031.20x = 988,297.20 × 520,063.20
  4. Step 4: Simplify right side
    660,031.20x = 513,977,004,383.04
  5. Step 5: Solve for x
    x = 513,977,004,383.04/660,031.20
  6. Step 6: Final answer
    x = 778,716.22

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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.