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Finding the Fourth Proportional to 613,312.40, 919,640.55 and 257,924.90

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Solution

The fourth proportional to 613,312.40, 919,640.55 and 257,924.90 is: 386,749.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,312.40 : 919,640.55 = 257,924.90 : x
  2. Step 2: Convert to fraction form
    613,312.40/919,640.55 = 257,924.90/x
  3. Step 3: Cross multiply
    613,312.40x = 919,640.55 × 257,924.90
  4. Step 4: Simplify right side
    613,312.40x = 237,198,196,894.70
  5. Step 5: Solve for x
    x = 237,198,196,894.70/613,312.40
  6. Step 6: Final answer
    x = 386,749.39

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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.