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Finding the Fourth Proportional to 398,368.52, 549,702.21 and 243,241.77

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Solution

The fourth proportional to 398,368.52, 549,702.21 and 243,241.77 is: 335,645.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,368.52 : 549,702.21 = 243,241.77 : x
  2. Step 2: Convert to fraction form
    398,368.52/549,702.21 = 243,241.77/x
  3. Step 3: Cross multiply
    398,368.52x = 549,702.21 × 243,241.77
  4. Step 4: Simplify right side
    398,368.52x = 133,710,538,533.31
  5. Step 5: Solve for x
    x = 133,710,538,533.31/398,368.52
  6. Step 6: Final answer
    x = 335,645.34

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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.