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Finding the Fourth Proportional to 319,226.70, 478,840.05 and 129,686.70

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Solution

The fourth proportional to 319,226.70, 478,840.05 and 129,686.70 is: 194,530.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,226.70 : 478,840.05 = 129,686.70 : x
  2. Step 2: Convert to fraction form
    319,226.70/478,840.05 = 129,686.70/x
  3. Step 3: Cross multiply
    319,226.70x = 478,840.05 × 129,686.70
  4. Step 4: Simplify right side
    319,226.70x = 62,099,185,912.34
  5. Step 5: Solve for x
    x = 62,099,185,912.34/319,226.70
  6. Step 6: Final answer
    x = 194,530.05

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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.