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Finding the Fourth Proportional to 867,990.90, 1,300,745.64 and 488,114.24

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Solution

The fourth proportional to 867,990.90, 1,300,745.64 and 488,114.24 is: 731,473.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,990.90 : 1,300,745.64 = 488,114.24 : x
  2. Step 2: Convert to fraction form
    867,990.90/1,300,745.64 = 488,114.24/x
  3. Step 3: Cross multiply
    867,990.90x = 1,300,745.64 × 488,114.24
  4. Step 4: Simplify right side
    867,990.90x = 634,912,462,998.19
  5. Step 5: Solve for x
    x = 634,912,462,998.19/867,990.90
  6. Step 6: Final answer
    x = 731,473.64

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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.