Home / 1,290,630.77-1,781,121.27-709,907.93

Finding the Fourth Proportional to 1,290,630.77, 1,781,121.27 and 709,907.93

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Solution

The fourth proportional to 1,290,630.77, 1,781,121.27 and 709,907.93 is: 979,700.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,630.77 : 1,781,121.27 = 709,907.93 : x
  2. Step 2: Convert to fraction form
    1,290,630.77/1,781,121.27 = 709,907.93/x
  3. Step 3: Cross multiply
    1,290,630.77x = 1,781,121.27 × 709,907.93
  4. Step 4: Simplify right side
    1,290,630.77x = 1,264,432,104,959.07
  5. Step 5: Solve for x
    x = 1,264,432,104,959.07/1,290,630.77
  6. Step 6: Final answer
    x = 979,700.89

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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.