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Finding the Fourth Proportional to 570,128.67, 786,783.11 and 315,479.25

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Solution

The fourth proportional to 570,128.67, 786,783.11 and 315,479.25 is: 435,364.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,128.67 : 786,783.11 = 315,479.25 : x
  2. Step 2: Convert to fraction form
    570,128.67/786,783.11 = 315,479.25/x
  3. Step 3: Cross multiply
    570,128.67x = 786,783.11 × 315,479.25
  4. Step 4: Simplify right side
    570,128.67x = 248,213,743,878.07
  5. Step 5: Solve for x
    x = 248,213,743,878.07/570,128.67
  6. Step 6: Final answer
    x = 435,364.43

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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.