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Finding the Fourth Proportional to 489,164.70, 683,430.90 and 489,164.70

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Solution

The fourth proportional to 489,164.70, 683,430.90 and 489,164.70 is: 683,430.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,164.70 : 683,430.90 = 489,164.70 : x
  2. Step 2: Convert to fraction form
    489,164.70/683,430.90 = 489,164.70/x
  3. Step 3: Cross multiply
    489,164.70x = 683,430.90 × 489,164.70
  4. Step 4: Simplify right side
    489,164.70x = 334,310,271,169.23
  5. Step 5: Solve for x
    x = 334,310,271,169.23/489,164.70
  6. Step 6: Final answer
    x = 683,430.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.