Home / 438,628.84-657,658.14-172,415.40

Finding the Fourth Proportional to 438,628.84, 657,658.14 and 172,415.40

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Solution

The fourth proportional to 438,628.84, 657,658.14 and 172,415.40 is: 258,511.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,628.84 : 657,658.14 = 172,415.40 : x
  2. Step 2: Convert to fraction form
    438,628.84/657,658.14 = 172,415.40/x
  3. Step 3: Cross multiply
    438,628.84x = 657,658.14 × 172,415.40
  4. Step 4: Simplify right side
    438,628.84x = 113,390,391,271.36
  5. Step 5: Solve for x
    x = 113,390,391,271.36/438,628.84
  6. Step 6: Final answer
    x = 258,511.03

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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.