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Finding the Fourth Proportional to 515,215.80, 772,463.70 and 304,745.40

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Solution

The fourth proportional to 515,215.80, 772,463.70 and 304,745.40 is: 456,905.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,215.80 : 772,463.70 = 304,745.40 : x
  2. Step 2: Convert to fraction form
    515,215.80/772,463.70 = 304,745.40/x
  3. Step 3: Cross multiply
    515,215.80x = 772,463.70 × 304,745.40
  4. Step 4: Simplify right side
    515,215.80x = 235,404,759,241.98
  5. Step 5: Solve for x
    x = 235,404,759,241.98/515,215.80
  6. Step 6: Final answer
    x = 456,905.16

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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.