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Finding the Fourth Proportional to 489,741.60, 734,612.40 and 331,111.20

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Solution

The fourth proportional to 489,741.60, 734,612.40 and 331,111.20 is: 496,666.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,741.60 : 734,612.40 = 331,111.20 : x
  2. Step 2: Convert to fraction form
    489,741.60/734,612.40 = 331,111.20/x
  3. Step 3: Cross multiply
    489,741.60x = 734,612.40 × 331,111.20
  4. Step 4: Simplify right side
    489,741.60x = 243,238,393,298.88
  5. Step 5: Solve for x
    x = 243,238,393,298.88/489,741.60
  6. Step 6: Final answer
    x = 496,666.80

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Similar ratio
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1.5x scale

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.