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Finding the Fourth Proportional to 421,758.51, 632,645.06 and 155,381.91

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Solution

The fourth proportional to 421,758.51, 632,645.06 and 155,381.91 is: 233,075.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,758.51 : 632,645.06 = 155,381.91 : x
  2. Step 2: Convert to fraction form
    421,758.51/632,645.06 = 155,381.91/x
  3. Step 3: Cross multiply
    421,758.51x = 632,645.06 × 155,381.91
  4. Step 4: Simplify right side
    421,758.51x = 98,301,596,997.96
  5. Step 5: Solve for x
    x = 98,301,596,997.96/421,758.51
  6. Step 6: Final answer
    x = 233,075.55

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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.