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Finding the Fourth Proportional to 402,688.05, 555,713.10 and 218,927.01

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Solution

The fourth proportional to 402,688.05, 555,713.10 and 218,927.01 is: 302,121.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,688.05 : 555,713.10 = 218,927.01 : x
  2. Step 2: Convert to fraction form
    402,688.05/555,713.10 = 218,927.01/x
  3. Step 3: Cross multiply
    402,688.05x = 555,713.10 × 218,927.01
  4. Step 4: Simplify right side
    402,688.05x = 121,660,607,400.83
  5. Step 5: Solve for x
    x = 121,660,607,400.83/402,688.05
  6. Step 6: Final answer
    x = 302,121.23

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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.