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Finding the Fourth Proportional to 1,319,935.02, 1,979,909.82 and 478,464.90

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Solution

The fourth proportional to 1,319,935.02, 1,979,909.82 and 478,464.90 is: 717,699.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,935.02 : 1,979,909.82 = 478,464.90 : x
  2. Step 2: Convert to fraction form
    1,319,935.02/1,979,909.82 = 478,464.90/x
  3. Step 3: Cross multiply
    1,319,935.02x = 1,979,909.82 × 478,464.90
  4. Step 4: Simplify right side
    1,319,935.02x = 947,317,354,035.32
  5. Step 5: Solve for x
    x = 947,317,354,035.32/1,319,935.02
  6. Step 6: Final answer
    x = 717,699.99

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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.