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Finding the Fourth Proportional to 390,585.16, 585,877.74 and 370,639.72

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Solution

The fourth proportional to 390,585.16, 585,877.74 and 370,639.72 is: 555,959.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,585.16 : 585,877.74 = 370,639.72 : x
  2. Step 2: Convert to fraction form
    390,585.16/585,877.74 = 370,639.72/x
  3. Step 3: Cross multiply
    390,585.16x = 585,877.74 × 370,639.72
  4. Step 4: Simplify right side
    390,585.16x = 217,149,561,507.83
  5. Step 5: Solve for x
    x = 217,149,561,507.83/390,585.16
  6. Step 6: Final answer
    x = 555,959.58

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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.