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Finding the Fourth Proportional to 478,643.52, 660,520.16 and 274,686.08

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Solution

The fourth proportional to 478,643.52, 660,520.16 and 274,686.08 is: 379,062.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,643.52 : 660,520.16 = 274,686.08 : x
  2. Step 2: Convert to fraction form
    478,643.52/660,520.16 = 274,686.08/x
  3. Step 3: Cross multiply
    478,643.52x = 660,520.16 × 274,686.08
  4. Step 4: Simplify right side
    478,643.52x = 181,435,693,511.37
  5. Step 5: Solve for x
    x = 181,435,693,511.37/478,643.52
  6. Step 6: Final answer
    x = 379,062.26

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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.