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Finding the Fourth Proportional to 2,657,976.40, 3,987,547.80 and 860,942.80

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Solution

The fourth proportional to 2,657,976.40, 3,987,547.80 and 860,942.80 is: 1,291,603.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,657,976.40 : 3,987,547.80 = 860,942.80 : x
  2. Step 2: Convert to fraction form
    2,657,976.40/3,987,547.80 = 860,942.80/x
  3. Step 3: Cross multiply
    2,657,976.40x = 3,987,547.80 × 860,942.80
  4. Step 4: Simplify right side
    2,657,976.40x = 3,433,050,568,065.84
  5. Step 5: Solve for x
    x = 3,433,050,568,065.84/2,657,976.40
  6. Step 6: Final answer
    x = 1,291,603.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.