Home / 1,312,771.20-1,811,621.55-709,159.20

Finding the Fourth Proportional to 1,312,771.20, 1,811,621.55 and 709,159.20

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Solution

The fourth proportional to 1,312,771.20, 1,811,621.55 and 709,159.20 is: 978,638.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,771.20 : 1,811,621.55 = 709,159.20 : x
  2. Step 2: Convert to fraction form
    1,312,771.20/1,811,621.55 = 709,159.20/x
  3. Step 3: Cross multiply
    1,312,771.20x = 1,811,621.55 × 709,159.20
  4. Step 4: Simplify right side
    1,312,771.20x = 1,284,728,089,100.76
  5. Step 5: Solve for x
    x = 1,284,728,089,100.76/1,312,771.20
  6. Step 6: Final answer
    x = 978,638.23

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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.