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Finding the Fourth Proportional to 668,987.40, 1,003,610.70 and 289,907.40

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Solution

The fourth proportional to 668,987.40, 1,003,610.70 and 289,907.40 is: 434,917.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,987.40 : 1,003,610.70 = 289,907.40 : x
  2. Step 2: Convert to fraction form
    668,987.40/1,003,610.70 = 289,907.40/x
  3. Step 3: Cross multiply
    668,987.40x = 1,003,610.70 × 289,907.40
  4. Step 4: Simplify right side
    668,987.40x = 290,954,168,649.18
  5. Step 5: Solve for x
    x = 290,954,168,649.18/668,987.40
  6. Step 6: Final answer
    x = 434,917.26

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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.