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Finding the Fourth Proportional to 1,539,000.90, 2,158,144.20 and 1,539,000.90

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Solution

The fourth proportional to 1,539,000.90, 2,158,144.20 and 1,539,000.90 is: 2,158,144.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539,000.90 : 2,158,144.20 = 1,539,000.90 : x
  2. Step 2: Convert to fraction form
    1,539,000.90/2,158,144.20 = 1,539,000.90/x
  3. Step 3: Cross multiply
    1,539,000.90x = 2,158,144.20 × 1,539,000.90
  4. Step 4: Simplify right side
    1,539,000.90x = 3,321,385,866,129.78
  5. Step 5: Solve for x
    x = 3,321,385,866,129.78/1,539,000.90
  6. Step 6: Final answer
    x = 2,158,144.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.