Home / 1,290,130.32-1,780,270.44-709,322.28

Finding the Fourth Proportional to 1,290,130.32, 1,780,270.44 and 709,322.28

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Solution

The fourth proportional to 1,290,130.32, 1,780,270.44 and 709,322.28 is: 978,804.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,130.32 : 1,780,270.44 = 709,322.28 : x
  2. Step 2: Convert to fraction form
    1,290,130.32/1,780,270.44 = 709,322.28/x
  3. Step 3: Cross multiply
    1,290,130.32x = 1,780,270.44 × 709,322.28
  4. Step 4: Simplify right side
    1,290,130.32x = 1,262,785,487,517.40
  5. Step 5: Solve for x
    x = 1,262,785,487,517.40/1,290,130.32
  6. Step 6: Final answer
    x = 978,804.60

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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.