Home / 421,280.81-631,858.90-154,979.04

Finding the Fourth Proportional to 421,280.81, 631,858.90 and 154,979.04

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Solution

The fourth proportional to 421,280.81, 631,858.90 and 154,979.04 is: 232,445.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,280.81 : 631,858.90 = 154,979.04 : x
  2. Step 2: Convert to fraction form
    421,280.81/631,858.90 = 154,979.04/x
  3. Step 3: Cross multiply
    421,280.81x = 631,858.90 × 154,979.04
  4. Step 4: Simplify right side
    421,280.81x = 97,924,885,737.46
  5. Step 5: Solve for x
    x = 97,924,885,737.46/421,280.81
  6. Step 6: Final answer
    x = 232,445.64

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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.