Home / 2,158,085.72-2,978,158.59-1,191,216.21

Finding the Fourth Proportional to 2,158,085.72, 2,978,158.59 and 1,191,216.21

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Solution

The fourth proportional to 2,158,085.72, 2,978,158.59 and 1,191,216.21 is: 1,643,878.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158,085.72 : 2,978,158.59 = 1,191,216.21 : x
  2. Step 2: Convert to fraction form
    2,158,085.72/2,978,158.59 = 1,191,216.21/x
  3. Step 3: Cross multiply
    2,158,085.72x = 2,978,158.59 × 1,191,216.21
  4. Step 4: Simplify right side
    2,158,085.72x = 3,547,630,788,358.74
  5. Step 5: Solve for x
    x = 3,547,630,788,358.74/2,158,085.72
  6. Step 6: Final answer
    x = 1,643,878.54

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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.