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Finding the Fourth Proportional to 644,403.52, 889,600.08 and 402,820.48

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Solution

The fourth proportional to 644,403.52, 889,600.08 and 402,820.48 is: 556,094.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,403.52 : 889,600.08 = 402,820.48 : x
  2. Step 2: Convert to fraction form
    644,403.52/889,600.08 = 402,820.48/x
  3. Step 3: Cross multiply
    644,403.52x = 889,600.08 × 402,820.48
  4. Step 4: Simplify right side
    644,403.52x = 358,349,131,233.64
  5. Step 5: Solve for x
    x = 358,349,131,233.64/644,403.52
  6. Step 6: Final answer
    x = 556,094.31

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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.