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Finding the Fourth Proportional to 569,670.72, 786,106.80 and 315,019.68

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Solution

The fourth proportional to 569,670.72, 786,106.80 and 315,019.68 is: 434,705.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    569,670.72 : 786,106.80 = 315,019.68 : x
  2. Step 2: Convert to fraction form
    569,670.72/786,106.80 = 315,019.68/x
  3. Step 3: Cross multiply
    569,670.72x = 786,106.80 × 315,019.68
  4. Step 4: Simplify right side
    569,670.72x = 247,639,112,581.82
  5. Step 5: Solve for x
    x = 247,639,112,581.82/569,670.72
  6. Step 6: Final answer
    x = 434,705.71

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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.