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Finding the Fourth Proportional to 691,720, 955,017.78 and 433,950.28

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Solution

The fourth proportional to 691,720, 955,017.78 and 433,950.28 is: 599,130.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,720 : 955,017.78 = 433,950.28 : x
  2. Step 2: Convert to fraction form
    691,720/955,017.78 = 433,950.28/x
  3. Step 3: Cross multiply
    691,720x = 955,017.78 × 433,950.28
  4. Step 4: Simplify right side
    691,720x = 414,430,233,035.98
  5. Step 5: Solve for x
    x = 414,430,233,035.98/691,720
  6. Step 6: Final answer
    x = 599,130.04

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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.