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Finding the Fourth Proportional to 380,459.70, 525,034.17 and 210,693.69

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Solution

The fourth proportional to 380,459.70, 525,034.17 and 210,693.69 is: 290,757.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,459.70 : 525,034.17 = 210,693.69 : x
  2. Step 2: Convert to fraction form
    380,459.70/525,034.17 = 210,693.69/x
  3. Step 3: Cross multiply
    380,459.70x = 525,034.17 × 210,693.69
  4. Step 4: Simplify right side
    380,459.70x = 110,621,386,653.39
  5. Step 5: Solve for x
    x = 110,621,386,653.39/380,459.70
  6. Step 6: Final answer
    x = 290,757.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.