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Finding the Fourth Proportional to 679,222.32, 938,283.54 and 643,350.06

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Solution

The fourth proportional to 679,222.32, 938,283.54 and 643,350.06 is: 888,729.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,222.32 : 938,283.54 = 643,350.06 : x
  2. Step 2: Convert to fraction form
    679,222.32/938,283.54 = 643,350.06/x
  3. Step 3: Cross multiply
    679,222.32x = 938,283.54 × 643,350.06
  4. Step 4: Simplify right side
    679,222.32x = 603,644,771,756.01
  5. Step 5: Solve for x
    x = 603,644,771,756.01/679,222.32
  6. Step 6: Final answer
    x = 888,729.29

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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.