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Finding the Fourth Proportional to 389,632.30, 584,448.46 and 319,590.70

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Solution

The fourth proportional to 389,632.30, 584,448.46 and 319,590.70 is: 479,386.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,632.30 : 584,448.46 = 319,590.70 : x
  2. Step 2: Convert to fraction form
    389,632.30/584,448.46 = 319,590.70/x
  3. Step 3: Cross multiply
    389,632.30x = 584,448.46 × 319,590.70
  4. Step 4: Simplify right side
    389,632.30x = 186,784,292,445.32
  5. Step 5: Solve for x
    x = 186,784,292,445.32/389,632.30
  6. Step 6: Final answer
    x = 479,386.06

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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.