Home / 467,844.54-645,040.53-390,431.76

Finding the Fourth Proportional to 467,844.54, 645,040.53 and 390,431.76

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Solution

The fourth proportional to 467,844.54, 645,040.53 and 390,431.76 is: 538,307.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    467,844.54 : 645,040.53 = 390,431.76 : x
  2. Step 2: Convert to fraction form
    467,844.54/645,040.53 = 390,431.76/x
  3. Step 3: Cross multiply
    467,844.54x = 645,040.53 × 390,431.76
  4. Step 4: Simplify right side
    467,844.54x = 251,844,309,399.23
  5. Step 5: Solve for x
    x = 251,844,309,399.23/467,844.54
  6. Step 6: Final answer
    x = 538,307.68

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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.