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Finding the Fourth Proportional to 518,564.70, 776,638.50 and 500,605.38

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Solution

The fourth proportional to 518,564.70, 776,638.50 and 500,605.38 is: 749,741.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,564.70 : 776,638.50 = 500,605.38 : x
  2. Step 2: Convert to fraction form
    518,564.70/776,638.50 = 500,605.38/x
  3. Step 3: Cross multiply
    518,564.70x = 776,638.50 × 500,605.38
  4. Step 4: Simplify right side
    518,564.70x = 388,789,411,415.13
  5. Step 5: Solve for x
    x = 388,789,411,415.13/518,564.70
  6. Step 6: Final answer
    x = 749,741.38

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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.