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Finding the Fourth Proportional to 388,307.40, 582,480.30 and 201,683.40

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Solution

The fourth proportional to 388,307.40, 582,480.30 and 201,683.40 is: 302,535.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,307.40 : 582,480.30 = 201,683.40 : x
  2. Step 2: Convert to fraction form
    388,307.40/582,480.30 = 201,683.40/x
  3. Step 3: Cross multiply
    388,307.40x = 582,480.30 × 201,683.40
  4. Step 4: Simplify right side
    388,307.40x = 117,476,607,337.02
  5. Step 5: Solve for x
    x = 117,476,607,337.02/388,307.40
  6. Step 6: Final answer
    x = 302,535.07

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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.