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Finding the Fourth Proportional to 390,590.91, 585,886.37 and 370,645.47

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Solution

The fourth proportional to 390,590.91, 585,886.37 and 370,645.47 is: 555,968.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,590.91 : 585,886.37 = 370,645.47 : x
  2. Step 2: Convert to fraction form
    390,590.91/585,886.37 = 370,645.47/x
  3. Step 3: Cross multiply
    390,590.91x = 585,886.37 × 370,645.47
  4. Step 4: Simplify right side
    390,590.91x = 217,156,127,122.02
  5. Step 5: Solve for x
    x = 217,156,127,122.02/390,590.91
  6. Step 6: Final answer
    x = 555,968.21

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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.