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Finding the Fourth Proportional to 679,138, 937,997.76 and 452,389.84

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Solution

The fourth proportional to 679,138, 937,997.76 and 452,389.84 is: 624,822.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,138 : 937,997.76 = 452,389.84 : x
  2. Step 2: Convert to fraction form
    679,138/937,997.76 = 452,389.84/x
  3. Step 3: Cross multiply
    679,138x = 937,997.76 × 452,389.84
  4. Step 4: Simplify right side
    679,138x = 424,340,656,566.76
  5. Step 5: Solve for x
    x = 424,340,656,566.76/679,138
  6. Step 6: Final answer
    x = 624,822.43

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1.5x scale

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.