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Finding the Fourth Proportional to 390,589.79, 585,884.68 and 370,644.35

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Solution

The fourth proportional to 390,589.79, 585,884.68 and 370,644.35 is: 555,966.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,589.79 : 585,884.68 = 370,644.35 : x
  2. Step 2: Convert to fraction form
    390,589.79/585,884.68 = 370,644.35/x
  3. Step 3: Cross multiply
    390,589.79x = 585,884.68 × 370,644.35
  4. Step 4: Simplify right side
    390,589.79x = 217,154,842,537.52
  5. Step 5: Solve for x
    x = 217,154,842,537.52/390,589.79
  6. Step 6: Final answer
    x = 555,966.52

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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.