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Finding the Fourth Proportional to 875,879.20, 1,314,013.20 and 402,450.40

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Solution

The fourth proportional to 875,879.20, 1,314,013.20 and 402,450.40 is: 603,764.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,879.20 : 1,314,013.20 = 402,450.40 : x
  2. Step 2: Convert to fraction form
    875,879.20/1,314,013.20 = 402,450.40/x
  3. Step 3: Cross multiply
    875,879.20x = 1,314,013.20 × 402,450.40
  4. Step 4: Simplify right side
    875,879.20x = 528,825,137,945.28
  5. Step 5: Solve for x
    x = 528,825,137,945.28/875,879.20
  6. Step 6: Final answer
    x = 603,764.92

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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.