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Finding the Fourth Proportional to 1,319,071.80, 1,978,607.70 and 321,799.80

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Solution

The fourth proportional to 1,319,071.80, 1,978,607.70 and 321,799.80 is: 482,699.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,071.80 : 1,978,607.70 = 321,799.80 : x
  2. Step 2: Convert to fraction form
    1,319,071.80/1,978,607.70 = 321,799.80/x
  3. Step 3: Cross multiply
    1,319,071.80x = 1,978,607.70 × 321,799.80
  4. Step 4: Simplify right side
    1,319,071.80x = 636,715,562,138.46
  5. Step 5: Solve for x
    x = 636,715,562,138.46/1,319,071.80
  6. Step 6: Final answer
    x = 482,699.70

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1.5x scale

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.