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Finding the Fourth Proportional to 405,877.60, 608,816.40 and 287,682.40

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Solution

The fourth proportional to 405,877.60, 608,816.40 and 287,682.40 is: 431,523.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,877.60 : 608,816.40 = 287,682.40 : x
  2. Step 2: Convert to fraction form
    405,877.60/608,816.40 = 287,682.40/x
  3. Step 3: Cross multiply
    405,877.60x = 608,816.40 × 287,682.40
  4. Step 4: Simplify right side
    405,877.60x = 175,145,763,111.36
  5. Step 5: Solve for x
    x = 175,145,763,111.36/405,877.60
  6. Step 6: Final answer
    x = 431,523.60

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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.