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Finding the Fourth Proportional to 520,064.90, 780,097.35 and 204,416.90

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Solution

The fourth proportional to 520,064.90, 780,097.35 and 204,416.90 is: 306,625.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,064.90 : 780,097.35 = 204,416.90 : x
  2. Step 2: Convert to fraction form
    520,064.90/780,097.35 = 204,416.90/x
  3. Step 3: Cross multiply
    520,064.90x = 780,097.35 × 204,416.90
  4. Step 4: Simplify right side
    520,064.90x = 159,465,081,985.22
  5. Step 5: Solve for x
    x = 159,465,081,985.22/520,064.90
  6. Step 6: Final answer
    x = 306,625.35

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Similar ratio
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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.