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Finding the Fourth Proportional to 657,686.44, 907,607.46 and 355,879.72

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Solution

The fourth proportional to 657,686.44, 907,607.46 and 355,879.72 is: 491,114.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,686.44 : 907,607.46 = 355,879.72 : x
  2. Step 2: Convert to fraction form
    657,686.44/907,607.46 = 355,879.72/x
  3. Step 3: Cross multiply
    657,686.44x = 907,607.46 × 355,879.72
  4. Step 4: Simplify right side
    657,686.44x = 322,999,088,734.71
  5. Step 5: Solve for x
    x = 322,999,088,734.71/657,686.44
  6. Step 6: Final answer
    x = 491,114.11

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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.