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Finding the Fourth Proportional to 517,713.80, 776,109.90 and 307,128.20

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Solution

The fourth proportional to 517,713.80, 776,109.90 and 307,128.20 is: 460,418.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,713.80 : 776,109.90 = 307,128.20 : x
  2. Step 2: Convert to fraction form
    517,713.80/776,109.90 = 307,128.20/x
  3. Step 3: Cross multiply
    517,713.80x = 776,109.90 × 307,128.20
  4. Step 4: Simplify right side
    517,713.80x = 238,365,236,589.18
  5. Step 5: Solve for x
    x = 238,365,236,589.18/517,713.80
  6. Step 6: Final answer
    x = 460,418.94

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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.