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Finding the Fourth Proportional to 621,647.40, 930,915.90 and 497,231.40

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Solution

The fourth proportional to 621,647.40, 930,915.90 and 497,231.40 is: 744,603.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,647.40 : 930,915.90 = 497,231.40 : x
  2. Step 2: Convert to fraction form
    621,647.40/930,915.90 = 497,231.40/x
  3. Step 3: Cross multiply
    621,647.40x = 930,915.90 × 497,231.40
  4. Step 4: Simplify right side
    621,647.40x = 462,880,616,239.26
  5. Step 5: Solve for x
    x = 462,880,616,239.26/621,647.40
  6. Step 6: Final answer
    x = 744,603.16

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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.