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Finding the Fourth Proportional to 879,657.70, 1,319,486.55 and 785,179.30

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Solution

The fourth proportional to 879,657.70, 1,319,486.55 and 785,179.30 is: 1,177,768.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,657.70 : 1,319,486.55 = 785,179.30 : x
  2. Step 2: Convert to fraction form
    879,657.70/1,319,486.55 = 785,179.30/x
  3. Step 3: Cross multiply
    879,657.70x = 1,319,486.55 × 785,179.30
  4. Step 4: Simplify right side
    879,657.70x = 1,036,033,525,688.42
  5. Step 5: Solve for x
    x = 1,036,033,525,688.42/879,657.70
  6. Step 6: Final answer
    x = 1,177,768.95

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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.