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Finding the Fourth Proportional to 289,347.76, 399,404.72 and 235,539.36

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Solution

The fourth proportional to 289,347.76, 399,404.72 and 235,539.36 is: 325,129.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,347.76 : 399,404.72 = 235,539.36 : x
  2. Step 2: Convert to fraction form
    289,347.76/399,404.72 = 235,539.36/x
  3. Step 3: Cross multiply
    289,347.76x = 399,404.72 × 235,539.36
  4. Step 4: Simplify right side
    289,347.76x = 94,075,532,718.63
  5. Step 5: Solve for x
    x = 94,075,532,718.63/289,347.76
  6. Step 6: Final answer
    x = 325,129.64

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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.