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Finding the Fourth Proportional to 803,669.60, 1,206,886.80 and 778,786.40

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Solution

The fourth proportional to 803,669.60, 1,206,886.80 and 778,786.40 is: 1,169,519.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    803,669.60 : 1,206,886.80 = 778,786.40 : x
  2. Step 2: Convert to fraction form
    803,669.60/1,206,886.80 = 778,786.40/x
  3. Step 3: Cross multiply
    803,669.60x = 1,206,886.80 × 778,786.40
  4. Step 4: Simplify right side
    803,669.60x = 939,907,026,179.52
  5. Step 5: Solve for x
    x = 939,907,026,179.52/803,669.60
  6. Step 6: Final answer
    x = 1,169,519.20

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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.