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Finding the Fourth Proportional to 391,055.85, 586,802.48 and 166,378.05

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Solution

The fourth proportional to 391,055.85, 586,802.48 and 166,378.05 is: 249,660.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,055.85 : 586,802.48 = 166,378.05 : x
  2. Step 2: Convert to fraction form
    391,055.85/586,802.48 = 166,378.05/x
  3. Step 3: Cross multiply
    391,055.85x = 586,802.48 × 166,378.05
  4. Step 4: Simplify right side
    391,055.85x = 97,631,051,525.67
  5. Step 5: Solve for x
    x = 97,631,051,525.67/391,055.85
  6. Step 6: Final answer
    x = 249,660.12

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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.