Home / 861,388,135.77-1,188,709,580.75-470,247,559.77

Finding the Fourth Proportional to 861,388,135.77, 1,188,709,580.75 and 470,247,559.77

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Solution

The fourth proportional to 861,388,135.77, 1,188,709,580.75 and 470,247,559.77 is: 648,938,331.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,388,135.77 : 1,188,709,580.75 = 470,247,559.77 : x
  2. Step 2: Convert to fraction form
    861,388,135.77/1,188,709,580.75 = 470,247,559.77/x
  3. Step 3: Cross multiply
    861,388,135.77x = 1,188,709,580.75 × 470,247,559.77
  4. Step 4: Simplify right side
    861,388,135.77x = 558,987,779,620,555,968
  5. Step 5: Solve for x
    x = 558,987,779,620,555,968/861,388,135.77
  6. Step 6: Final answer
    x = 648,938,331.52

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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.