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Finding the Fourth Proportional to 679,817.40, 1,020,017.70 and 347,393.40

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Solution

The fourth proportional to 679,817.40, 1,020,017.70 and 347,393.40 is: 521,239.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,817.40 : 1,020,017.70 = 347,393.40 : x
  2. Step 2: Convert to fraction form
    679,817.40/1,020,017.70 = 347,393.40/x
  3. Step 3: Cross multiply
    679,817.40x = 1,020,017.70 × 347,393.40
  4. Step 4: Simplify right side
    679,817.40x = 354,347,416,863.18
  5. Step 5: Solve for x
    x = 354,347,416,863.18/679,817.40
  6. Step 6: Final answer
    x = 521,239.11

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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.