Home / 487,830.72-731,746.06-321,579.84

Finding the Fourth Proportional to 487,830.72, 731,746.06 and 321,579.84

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Solution

The fourth proportional to 487,830.72, 731,746.06 and 321,579.84 is: 482,369.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,830.72 : 731,746.06 = 321,579.84 : x
  2. Step 2: Convert to fraction form
    487,830.72/731,746.06 = 321,579.84/x
  3. Step 3: Cross multiply
    487,830.72x = 731,746.06 × 321,579.84
  4. Step 4: Simplify right side
    487,830.72x = 235,314,780,895.43
  5. Step 5: Solve for x
    x = 235,314,780,895.43/487,830.72
  6. Step 6: Final answer
    x = 482,369.75

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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.