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Finding the Fourth Proportional to 570,144.48, 786,279.60 and 489,546.72

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Solution

The fourth proportional to 570,144.48, 786,279.60 and 489,546.72 is: 675,128.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,144.48 : 786,279.60 = 489,546.72 : x
  2. Step 2: Convert to fraction form
    570,144.48/786,279.60 = 489,546.72/x
  3. Step 3: Cross multiply
    570,144.48x = 786,279.60 × 489,546.72
  4. Step 4: Simplify right side
    570,144.48x = 384,920,599,182.91
  5. Step 5: Solve for x
    x = 384,920,599,182.91/570,144.48
  6. Step 6: Final answer
    x = 675,128.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.