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Finding the Fourth Proportional to 388,457.09, 583,222.29 and 268,231.89

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Solution

The fourth proportional to 388,457.09, 583,222.29 and 268,231.89 is: 402,718.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,457.09 : 583,222.29 = 268,231.89 : x
  2. Step 2: Convert to fraction form
    388,457.09/583,222.29 = 268,231.89/x
  3. Step 3: Cross multiply
    388,457.09x = 583,222.29 × 268,231.89
  4. Step 4: Simplify right side
    388,457.09x = 156,438,817,136.83
  5. Step 5: Solve for x
    x = 156,438,817,136.83/388,457.09
  6. Step 6: Final answer
    x = 402,718.40

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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.