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Finding the Fourth Proportional to 918,929.80, 1,375,629.90 and 808,337.80

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Solution

The fourth proportional to 918,929.80, 1,375,629.90 and 808,337.80 is: 1,210,074.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,929.80 : 1,375,629.90 = 808,337.80 : x
  2. Step 2: Convert to fraction form
    918,929.80/1,375,629.90 = 808,337.80/x
  3. Step 3: Cross multiply
    918,929.80x = 1,375,629.90 × 808,337.80
  4. Step 4: Simplify right side
    918,929.80x = 1,111,973,646,980.22
  5. Step 5: Solve for x
    x = 1,111,973,646,980.22/918,929.80
  6. Step 6: Final answer
    x = 1,210,074.64

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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.