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Finding the Fourth Proportional to 613,318.50, 920,667.78 and 258,630.84

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Solution

The fourth proportional to 613,318.50, 920,667.78 and 258,630.84 is: 388,237.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,318.50 : 920,667.78 = 258,630.84 : x
  2. Step 2: Convert to fraction form
    613,318.50/920,667.78 = 258,630.84/x
  3. Step 3: Cross multiply
    613,318.50x = 920,667.78 × 258,630.84
  4. Step 4: Simplify right side
    613,318.50x = 238,113,081,302.34
  5. Step 5: Solve for x
    x = 238,113,081,302.34/613,318.50
  6. Step 6: Final answer
    x = 388,237.24

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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.