Home / 643,741.62-888,322.03-402,009.67

Finding the Fourth Proportional to 643,741.62, 888,322.03 and 402,009.67

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Solution

The fourth proportional to 643,741.62, 888,322.03 and 402,009.67 is: 554,747.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,741.62 : 888,322.03 = 402,009.67 : x
  2. Step 2: Convert to fraction form
    643,741.62/888,322.03 = 402,009.67/x
  3. Step 3: Cross multiply
    643,741.62x = 888,322.03 × 402,009.67
  4. Step 4: Simplify right side
    643,741.62x = 357,114,046,134.03
  5. Step 5: Solve for x
    x = 357,114,046,134.03/643,741.62
  6. Step 6: Final answer
    x = 554,747.49

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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.