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Finding the Fourth Proportional to 803,756.10, 1,207,016.55 and 778,872.90

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Solution

The fourth proportional to 803,756.10, 1,207,016.55 and 778,872.90 is: 1,169,648.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    803,756.10 : 1,207,016.55 = 778,872.90 : x
  2. Step 2: Convert to fraction form
    803,756.10/1,207,016.55 = 778,872.90/x
  3. Step 3: Cross multiply
    803,756.10x = 1,207,016.55 × 778,872.90
  4. Step 4: Simplify right side
    803,756.10x = 940,112,480,646.50
  5. Step 5: Solve for x
    x = 940,112,480,646.50/803,756.10
  6. Step 6: Final answer
    x = 1,169,648.95

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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.