Home / 648,364.20-971,890.20-381,987.60

Finding the Fourth Proportional to 648,364.20, 971,890.20 and 381,987.60

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Solution

The fourth proportional to 648,364.20, 971,890.20 and 381,987.60 is: 572,594.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,364.20 : 971,890.20 = 381,987.60 : x
  2. Step 2: Convert to fraction form
    648,364.20/971,890.20 = 381,987.60/x
  3. Step 3: Cross multiply
    648,364.20x = 971,890.20 × 381,987.60
  4. Step 4: Simplify right side
    648,364.20x = 371,250,004,961.52
  5. Step 5: Solve for x
    x = 371,250,004,961.52/648,364.20
  6. Step 6: Final answer
    x = 572,594.85

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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.