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Finding the Fourth Proportional to 624,005.60, 936,008.40 and 413,880.80

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Solution

The fourth proportional to 624,005.60, 936,008.40 and 413,880.80 is: 620,821.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,005.60 : 936,008.40 = 413,880.80 : x
  2. Step 2: Convert to fraction form
    624,005.60/936,008.40 = 413,880.80/x
  3. Step 3: Cross multiply
    624,005.60x = 936,008.40 × 413,880.80
  4. Step 4: Simplify right side
    624,005.60x = 387,395,905,398.72
  5. Step 5: Solve for x
    x = 387,395,905,398.72/624,005.60
  6. Step 6: Final answer
    x = 620,821.20

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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.