Home / 380,654.56-525,280.53-210,876.40

Finding the Fourth Proportional to 380,654.56, 525,280.53 and 210,876.40

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Solution

The fourth proportional to 380,654.56, 525,280.53 and 210,876.40 is: 290,996.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,654.56 : 525,280.53 = 210,876.40 : x
  2. Step 2: Convert to fraction form
    380,654.56/525,280.53 = 210,876.40/x
  3. Step 3: Cross multiply
    380,654.56x = 525,280.53 × 210,876.40
  4. Step 4: Simplify right side
    380,654.56x = 110,769,267,156.49
  5. Step 5: Solve for x
    x = 110,769,267,156.49/380,654.56
  6. Step 6: Final answer
    x = 290,996.82

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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.