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Finding the Fourth Proportional to 623,690.40, 936,399.60 and 400,432.80

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Solution

The fourth proportional to 623,690.40, 936,399.60 and 400,432.80 is: 601,203.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,690.40 : 936,399.60 = 400,432.80 : x
  2. Step 2: Convert to fraction form
    623,690.40/936,399.60 = 400,432.80/x
  3. Step 3: Cross multiply
    623,690.40x = 936,399.60 × 400,432.80
  4. Step 4: Simplify right side
    623,690.40x = 374,965,113,746.88
  5. Step 5: Solve for x
    x = 374,965,113,746.88/623,690.40
  6. Step 6: Final answer
    x = 601,203.92

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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.