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Finding the Fourth Proportional to 778,756.80, 1,167,479.10 and 404,779.80

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Solution

The fourth proportional to 778,756.80, 1,167,479.10 and 404,779.80 is: 606,828.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,756.80 : 1,167,479.10 = 404,779.80 : x
  2. Step 2: Convert to fraction form
    778,756.80/1,167,479.10 = 404,779.80/x
  3. Step 3: Cross multiply
    778,756.80x = 1,167,479.10 × 404,779.80
  4. Step 4: Simplify right side
    778,756.80x = 472,571,956,602.18
  5. Step 5: Solve for x
    x = 472,571,956,602.18/778,756.80
  6. Step 6: Final answer
    x = 606,828.67

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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.