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Finding the Fourth Proportional to 397,392.61, 549,845.93 and 346,511.45

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Solution

The fourth proportional to 397,392.61, 549,845.93 and 346,511.45 is: 479,445.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,392.61 : 549,845.93 = 346,511.45 : x
  2. Step 2: Convert to fraction form
    397,392.61/549,845.93 = 346,511.45/x
  3. Step 3: Cross multiply
    397,392.61x = 549,845.93 × 346,511.45
  4. Step 4: Simplify right side
    397,392.61x = 190,527,910,480.90
  5. Step 5: Solve for x
    x = 190,527,910,480.90/397,392.61
  6. Step 6: Final answer
    x = 479,445.03

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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.