Home / 917,128.24-1,265,639.45-509,230.87

Finding the Fourth Proportional to 917,128.24, 1,265,639.45 and 509,230.87

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Solution

The fourth proportional to 917,128.24, 1,265,639.45 and 509,230.87 is: 702,739.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,128.24 : 1,265,639.45 = 509,230.87 : x
  2. Step 2: Convert to fraction form
    917,128.24/1,265,639.45 = 509,230.87/x
  3. Step 3: Cross multiply
    917,128.24x = 1,265,639.45 × 509,230.87
  4. Step 4: Simplify right side
    917,128.24x = 644,502,672,519.57
  5. Step 5: Solve for x
    x = 644,502,672,519.57/917,128.24
  6. Step 6: Final answer
    x = 702,739.97

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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.