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Finding the Fourth Proportional to 644,804.42, 889,554.02 and 402,666.66

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Solution

The fourth proportional to 644,804.42, 889,554.02 and 402,666.66 is: 555,507.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,804.42 : 889,554.02 = 402,666.66 : x
  2. Step 2: Convert to fraction form
    644,804.42/889,554.02 = 402,666.66/x
  3. Step 3: Cross multiply
    644,804.42x = 889,554.02 × 402,666.66
  4. Step 4: Simplify right side
    644,804.42x = 358,193,744,109.64
  5. Step 5: Solve for x
    x = 358,193,744,109.64/644,804.42
  6. Step 6: Final answer
    x = 555,507.59

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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.