Home / 1,620,009.80-2,430,705.90-778,128.20

Finding the Fourth Proportional to 1,620,009.80, 2,430,705.90 and 778,128.20

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Solution

The fourth proportional to 1,620,009.80, 2,430,705.90 and 778,128.20 is: 1,167,524.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620,009.80 : 2,430,705.90 = 778,128.20 : x
  2. Step 2: Convert to fraction form
    1,620,009.80/2,430,705.90 = 778,128.20/x
  3. Step 3: Cross multiply
    1,620,009.80x = 2,430,705.90 × 778,128.20
  4. Step 4: Simplify right side
    1,620,009.80x = 1,891,400,806,696.38
  5. Step 5: Solve for x
    x = 1,891,400,806,696.38/1,620,009.80
  6. Step 6: Final answer
    x = 1,167,524.30

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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.