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Finding the Fourth Proportional to 635,615.34, 876,430.35 and 405,870.54

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Solution

The fourth proportional to 635,615.34, 876,430.35 and 405,870.54 is: 559,642.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    635,615.34 : 876,430.35 = 405,870.54 : x
  2. Step 2: Convert to fraction form
    635,615.34/876,430.35 = 405,870.54/x
  3. Step 3: Cross multiply
    635,615.34x = 876,430.35 × 405,870.54
  4. Step 4: Simplify right side
    635,615.34x = 355,717,259,426.89
  5. Step 5: Solve for x
    x = 355,717,259,426.89/635,615.34
  6. Step 6: Final answer
    x = 559,642.35

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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.