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Finding the Fourth Proportional to 800,998.80, 1,201,498.20 and 765,569.40

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Solution

The fourth proportional to 800,998.80, 1,201,498.20 and 765,569.40 is: 1,148,354.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,998.80 : 1,201,498.20 = 765,569.40 : x
  2. Step 2: Convert to fraction form
    800,998.80/1,201,498.20 = 765,569.40/x
  3. Step 3: Cross multiply
    800,998.80x = 1,201,498.20 × 765,569.40
  4. Step 4: Simplify right side
    800,998.80x = 919,830,256,075.08
  5. Step 5: Solve for x
    x = 919,830,256,075.08/800,998.80
  6. Step 6: Final answer
    x = 1,148,354.10

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1.5x scale

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.