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Finding the Fourth Proportional to 402,673.61, 555,693.18 and 218,912.56

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Solution

The fourth proportional to 402,673.61, 555,693.18 and 218,912.56 is: 302,101.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,673.61 : 555,693.18 = 218,912.56 : x
  2. Step 2: Convert to fraction form
    402,673.61/555,693.18 = 218,912.56/x
  3. Step 3: Cross multiply
    402,673.61x = 555,693.18 × 218,912.56
  4. Step 4: Simplify right side
    402,673.61x = 121,648,214,398.19
  5. Step 5: Solve for x
    x = 121,648,214,398.19/402,673.61
  6. Step 6: Final answer
    x = 302,101.28

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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.