Home / 921,657.40-1,382,486.10-878,111.80

Finding the Fourth Proportional to 921,657.40, 1,382,486.10 and 878,111.80

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Solution

The fourth proportional to 921,657.40, 1,382,486.10 and 878,111.80 is: 1,317,167.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,657.40 : 1,382,486.10 = 878,111.80 : x
  2. Step 2: Convert to fraction form
    921,657.40/1,382,486.10 = 878,111.80/x
  3. Step 3: Cross multiply
    921,657.40x = 1,382,486.10 × 878,111.80
  4. Step 4: Simplify right side
    921,657.40x = 1,213,977,357,745.98
  5. Step 5: Solve for x
    x = 1,213,977,357,745.98/921,657.40
  6. Step 6: Final answer
    x = 1,317,167.70

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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.