Home / 1,278,386.80-1,915,247.40-779,167.60

Finding the Fourth Proportional to 1,278,386.80, 1,915,247.40 and 779,167.60

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Solution

The fourth proportional to 1,278,386.80, 1,915,247.40 and 779,167.60 is: 1,167,329.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,386.80 : 1,915,247.40 = 779,167.60 : x
  2. Step 2: Convert to fraction form
    1,278,386.80/1,915,247.40 = 779,167.60/x
  3. Step 3: Cross multiply
    1,278,386.80x = 1,915,247.40 × 779,167.60
  4. Step 4: Simplify right side
    1,278,386.80x = 1,492,298,720,064.24
  5. Step 5: Solve for x
    x = 1,492,298,720,064.24/1,278,386.80
  6. Step 6: Final answer
    x = 1,167,329.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.