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Finding the Fourth Proportional to 356,800.80, 492,407.88 and 235,729.71

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Solution

The fourth proportional to 356,800.80, 492,407.88 and 235,729.71 is: 325,322.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,800.80 : 492,407.88 = 235,729.71 : x
  2. Step 2: Convert to fraction form
    356,800.80/492,407.88 = 235,729.71/x
  3. Step 3: Cross multiply
    356,800.80x = 492,407.88 × 235,729.71
  4. Step 4: Simplify right side
    356,800.80x = 116,075,166,754.12
  5. Step 5: Solve for x
    x = 116,075,166,754.12/356,800.80
  6. Step 6: Final answer
    x = 325,322.05

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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.