Home / 421,070.32-631,627.35-210,637.18

Finding the Fourth Proportional to 421,070.32, 631,627.35 and 210,637.18

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Solution

The fourth proportional to 421,070.32, 631,627.35 and 210,637.18 is: 315,966.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,070.32 : 631,627.35 = 210,637.18 : x
  2. Step 2: Convert to fraction form
    421,070.32/631,627.35 = 210,637.18/x
  3. Step 3: Cross multiply
    421,070.32x = 631,627.35 × 210,637.18
  4. Step 4: Simplify right side
    421,070.32x = 133,044,203,814.87
  5. Step 5: Solve for x
    x = 133,044,203,814.87/421,070.32
  6. Step 6: Final answer
    x = 315,966.71

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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.