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Finding the Fourth Proportional to 412,879.40, 619,319.10 and 360,391.40

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Solution

The fourth proportional to 412,879.40, 619,319.10 and 360,391.40 is: 540,587.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,879.40 : 619,319.10 = 360,391.40 : x
  2. Step 2: Convert to fraction form
    412,879.40/619,319.10 = 360,391.40/x
  3. Step 3: Cross multiply
    412,879.40x = 619,319.10 × 360,391.40
  4. Step 4: Simplify right side
    412,879.40x = 223,197,277,495.74
  5. Step 5: Solve for x
    x = 223,197,277,495.74/412,879.40
  6. Step 6: Final answer
    x = 540,587.10

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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.