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Finding the Fourth Proportional to 411,967.40, 618,315.60 and 243,276.80

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Solution

The fourth proportional to 411,967.40, 618,315.60 and 243,276.80 is: 365,130.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,967.40 : 618,315.60 = 243,276.80 : x
  2. Step 2: Convert to fraction form
    411,967.40/618,315.60 = 243,276.80/x
  3. Step 3: Cross multiply
    411,967.40x = 618,315.60 × 243,276.80
  4. Step 4: Simplify right side
    411,967.40x = 150,421,840,558.08
  5. Step 5: Solve for x
    x = 150,421,840,558.08/411,967.40
  6. Step 6: Final answer
    x = 365,130.45

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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.