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Finding the Fourth Proportional to 390,703.88, 585,939.18 and 166,063.34

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Solution

The fourth proportional to 390,703.88, 585,939.18 and 166,063.34 is: 249,045.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,703.88 : 585,939.18 = 166,063.34 : x
  2. Step 2: Convert to fraction form
    390,703.88/585,939.18 = 166,063.34/x
  3. Step 3: Cross multiply
    390,703.88x = 585,939.18 × 166,063.34
  4. Step 4: Simplify right side
    390,703.88x = 97,303,017,267.66
  5. Step 5: Solve for x
    x = 97,303,017,267.66/390,703.88
  6. Step 6: Final answer
    x = 249,045.43

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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.