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Finding the Fourth Proportional to 390,440.68, 537,690.65 and 366,111.21

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Solution

The fourth proportional to 390,440.68, 537,690.65 and 366,111.21 is: 504,185.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,440.68 : 537,690.65 = 366,111.21 : x
  2. Step 2: Convert to fraction form
    390,440.68/537,690.65 = 366,111.21/x
  3. Step 3: Cross multiply
    390,440.68x = 537,690.65 × 366,111.21
  4. Step 4: Simplify right side
    390,440.68x = 196,854,574,477.19
  5. Step 5: Solve for x
    x = 196,854,574,477.19/390,440.68
  6. Step 6: Final answer
    x = 504,185.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.