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Finding the Fourth Proportional to 1,319,932.02, 1,979,905.32 and 478,461.90

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Solution

The fourth proportional to 1,319,932.02, 1,979,905.32 and 478,461.90 is: 717,695.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,932.02 : 1,979,905.32 = 478,461.90 : x
  2. Step 2: Convert to fraction form
    1,319,932.02/1,979,905.32 = 478,461.90/x
  3. Step 3: Cross multiply
    1,319,932.02x = 1,979,905.32 × 478,461.90
  4. Step 4: Simplify right side
    1,319,932.02x = 947,309,261,227.31
  5. Step 5: Solve for x
    x = 947,309,261,227.31/1,319,932.02
  6. Step 6: Final answer
    x = 717,695.49

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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.