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Finding the Fourth Proportional to 615,908.69, 849,978.21 and 354,263.51

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Solution

The fourth proportional to 615,908.69, 849,978.21 and 354,263.51 is: 488,897.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,908.69 : 849,978.21 = 354,263.51 : x
  2. Step 2: Convert to fraction form
    615,908.69/849,978.21 = 354,263.51/x
  3. Step 3: Cross multiply
    615,908.69x = 849,978.21 × 354,263.51
  4. Step 4: Simplify right side
    615,908.69x = 301,116,264,098.12
  5. Step 5: Solve for x
    x = 301,116,264,098.12/615,908.69
  6. Step 6: Final answer
    x = 488,897.57

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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.