Home / 1,388,210.20-1,915,827.60-776,419.90

Finding the Fourth Proportional to 1,388,210.20, 1,915,827.60 and 776,419.90

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Solution

The fourth proportional to 1,388,210.20, 1,915,827.60 and 776,419.90 is: 1,071,514.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,210.20 : 1,915,827.60 = 776,419.90 : x
  2. Step 2: Convert to fraction form
    1,388,210.20/1,915,827.60 = 776,419.90/x
  3. Step 3: Cross multiply
    1,388,210.20x = 1,915,827.60 × 776,419.90
  4. Step 4: Simplify right side
    1,388,210.20x = 1,487,486,673,609.24
  5. Step 5: Solve for x
    x = 1,487,486,673,609.24/1,388,210.20
  6. Step 6: Final answer
    x = 1,071,514.01

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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.