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Finding the Fourth Proportional to 478,490.64, 717,735.95 and 141,505.04

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Solution

The fourth proportional to 478,490.64, 717,735.95 and 141,505.04 is: 212,257.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,490.64 : 717,735.95 = 141,505.04 : x
  2. Step 2: Convert to fraction form
    478,490.64/717,735.95 = 141,505.04/x
  3. Step 3: Cross multiply
    478,490.64x = 717,735.95 × 141,505.04
  4. Step 4: Simplify right side
    478,490.64x = 101,563,250,017.98
  5. Step 5: Solve for x
    x = 101,563,250,017.98/478,490.64
  6. Step 6: Final answer
    x = 212,257.55

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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.