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Finding the Fourth Proportional to 879,657.60, 1,319,486.40 and 779,930.40

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Solution

The fourth proportional to 879,657.60, 1,319,486.40 and 779,930.40 is: 1,169,895.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,657.60 : 1,319,486.40 = 779,930.40 : x
  2. Step 2: Convert to fraction form
    879,657.60/1,319,486.40 = 779,930.40/x
  3. Step 3: Cross multiply
    879,657.60x = 1,319,486.40 × 779,930.40
  4. Step 4: Simplify right side
    879,657.60x = 1,029,107,555,746.56
  5. Step 5: Solve for x
    x = 1,029,107,555,746.56/879,657.60
  6. Step 6: Final answer
    x = 1,169,895.60

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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.