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Finding the Fourth Proportional to 390,587.54, 585,881.30 and 370,642.10

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Solution

The fourth proportional to 390,587.54, 585,881.30 and 370,642.10 is: 555,963.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,587.54 : 585,881.30 = 370,642.10 : x
  2. Step 2: Convert to fraction form
    390,587.54/585,881.30 = 370,642.10/x
  3. Step 3: Cross multiply
    390,587.54x = 585,881.30 × 370,642.10
  4. Step 4: Simplify right side
    390,587.54x = 217,152,273,379.93
  5. Step 5: Solve for x
    x = 217,152,273,379.93/390,587.54
  6. Step 6: Final answer
    x = 555,963.14

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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.