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Finding the Fourth Proportional to 654,902.40, 903,817.80 and 368,405.40

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Solution

The fourth proportional to 654,902.40, 903,817.80 and 368,405.40 is: 508,428.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,902.40 : 903,817.80 = 368,405.40 : x
  2. Step 2: Convert to fraction form
    654,902.40/903,817.80 = 368,405.40/x
  3. Step 3: Cross multiply
    654,902.40x = 903,817.80 × 368,405.40
  4. Step 4: Simplify right side
    654,902.40x = 332,971,358,136.12
  5. Step 5: Solve for x
    x = 332,971,358,136.12/654,902.40
  6. Step 6: Final answer
    x = 508,428.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.