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Finding the Fourth Proportional to 675,029.80, 1,012,544.70 and 438,639.40

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Solution

The fourth proportional to 675,029.80, 1,012,544.70 and 438,639.40 is: 657,959.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,029.80 : 1,012,544.70 = 438,639.40 : x
  2. Step 2: Convert to fraction form
    675,029.80/1,012,544.70 = 438,639.40/x
  3. Step 3: Cross multiply
    675,029.80x = 1,012,544.70 × 438,639.40
  4. Step 4: Simplify right side
    675,029.80x = 444,141,999,681.18
  5. Step 5: Solve for x
    x = 444,141,999,681.18/675,029.80
  6. Step 6: Final answer
    x = 657,959.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.