Home / 1,290,661.29-1,781,155.85-709,908.98

Finding the Fourth Proportional to 1,290,661.29, 1,781,155.85 and 709,908.98

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Solution

The fourth proportional to 1,290,661.29, 1,781,155.85 and 709,908.98 is: 979,698.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,661.29 : 1,781,155.85 = 709,908.98 : x
  2. Step 2: Convert to fraction form
    1,290,661.29/1,781,155.85 = 709,908.98/x
  3. Step 3: Cross multiply
    1,290,661.29x = 1,781,155.85 × 709,908.98
  4. Step 4: Simplify right side
    1,290,661.29x = 1,264,458,520,239.21
  5. Step 5: Solve for x
    x = 1,264,458,520,239.21/1,290,661.29
  6. Step 6: Final answer
    x = 979,698.18

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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.