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Finding the Fourth Proportional to 611,136.40, 916,704.60 and 256,032.40

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Solution

The fourth proportional to 611,136.40, 916,704.60 and 256,032.40 is: 384,048.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,136.40 : 916,704.60 = 256,032.40 : x
  2. Step 2: Convert to fraction form
    611,136.40/916,704.60 = 256,032.40/x
  3. Step 3: Cross multiply
    611,136.40x = 916,704.60 × 256,032.40
  4. Step 4: Simplify right side
    611,136.40x = 234,706,078,829.04
  5. Step 5: Solve for x
    x = 234,706,078,829.04/611,136.40
  6. Step 6: Final answer
    x = 384,048.60

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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.