Home / 917,128.31-1,265,575.39-509,209.07

Finding the Fourth Proportional to 917,128.31, 1,265,575.39 and 509,209.07

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Solution

The fourth proportional to 917,128.31, 1,265,575.39 and 509,209.07 is: 702,674.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,128.31 : 1,265,575.39 = 509,209.07 : x
  2. Step 2: Convert to fraction form
    917,128.31/1,265,575.39 = 509,209.07/x
  3. Step 3: Cross multiply
    917,128.31x = 1,265,575.39 × 509,209.07
  4. Step 4: Simplify right side
    917,128.31x = 644,442,459,755.89
  5. Step 5: Solve for x
    x = 644,442,459,755.89/917,128.31
  6. Step 6: Final answer
    x = 702,674.27

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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.