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Finding the Fourth Proportional to 447,488.40, 670,541.40 and 388,045.20

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Solution

The fourth proportional to 447,488.40, 670,541.40 and 388,045.20 is: 581,468.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,488.40 : 670,541.40 = 388,045.20 : x
  2. Step 2: Convert to fraction form
    447,488.40/670,541.40 = 388,045.20/x
  3. Step 3: Cross multiply
    447,488.40x = 670,541.40 × 388,045.20
  4. Step 4: Simplify right side
    447,488.40x = 260,200,371,671.28
  5. Step 5: Solve for x
    x = 260,200,371,671.28/447,488.40
  6. Step 6: Final answer
    x = 581,468.42

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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.