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Finding the Fourth Proportional to 602,879.42, 831,803.18 and 388,143.81

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Solution

The fourth proportional to 602,879.42, 831,803.18 and 388,143.81 is: 535,528.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    602,879.42 : 831,803.18 = 388,143.81 : x
  2. Step 2: Convert to fraction form
    602,879.42/831,803.18 = 388,143.81/x
  3. Step 3: Cross multiply
    602,879.42x = 831,803.18 × 388,143.81
  4. Step 4: Simplify right side
    602,879.42x = 322,859,253,514.60
  5. Step 5: Solve for x
    x = 322,859,253,514.60/602,879.42
  6. Step 6: Final answer
    x = 535,528.74

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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.