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Finding the Fourth Proportional to 478,485.99, 660,338.21 and 274,535.02

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Solution

The fourth proportional to 478,485.99, 660,338.21 and 274,535.02 is: 378,874.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,485.99 : 660,338.21 = 274,535.02 : x
  2. Step 2: Convert to fraction form
    478,485.99/660,338.21 = 274,535.02/x
  3. Step 3: Cross multiply
    478,485.99x = 660,338.21 × 274,535.02
  4. Step 4: Simplify right side
    478,485.99x = 181,285,963,689.11
  5. Step 5: Solve for x
    x = 181,285,963,689.11/478,485.99
  6. Step 6: Final answer
    x = 378,874.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.