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Finding the Fourth Proportional to 528,127.67, 728,796.52 and 313,139.09

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Solution

The fourth proportional to 528,127.67, 728,796.52 and 313,139.09 is: 432,120.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,127.67 : 728,796.52 = 313,139.09 : x
  2. Step 2: Convert to fraction form
    528,127.67/728,796.52 = 313,139.09/x
  3. Step 3: Cross multiply
    528,127.67x = 728,796.52 × 313,139.09
  4. Step 4: Simplify right side
    528,127.67x = 228,214,681,281.38
  5. Step 5: Solve for x
    x = 228,214,681,281.38/528,127.67
  6. Step 6: Final answer
    x = 432,120.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.