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Finding the Fourth Proportional to 780,114.40, 1,168,859.40 and 667,265.20

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Solution

The fourth proportional to 780,114.40, 1,168,859.40 and 667,265.20 is: 999,775.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,114.40 : 1,168,859.40 = 667,265.20 : x
  2. Step 2: Convert to fraction form
    780,114.40/1,168,859.40 = 667,265.20/x
  3. Step 3: Cross multiply
    780,114.40x = 1,168,859.40 × 667,265.20
  4. Step 4: Simplify right side
    780,114.40x = 779,939,201,312.88
  5. Step 5: Solve for x
    x = 779,939,201,312.88/780,114.40
  6. Step 6: Final answer
    x = 999,775.42

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1.5x scale

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.