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Finding the Fourth Proportional to 640,840.65, 961,315.65 and 167,525.25

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Solution

The fourth proportional to 640,840.65, 961,315.65 and 167,525.25 is: 251,302.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,840.65 : 961,315.65 = 167,525.25 : x
  2. Step 2: Convert to fraction form
    640,840.65/961,315.65 = 167,525.25/x
  3. Step 3: Cross multiply
    640,840.65x = 961,315.65 × 167,525.25
  4. Step 4: Simplify right side
    640,840.65x = 161,044,644,595.16
  5. Step 5: Solve for x
    x = 161,044,644,595.16/640,840.65
  6. Step 6: Final answer
    x = 251,302.17

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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.