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Finding the Fourth Proportional to 616,921.48, 851,009.70 and 358,770.16

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Solution

The fourth proportional to 616,921.48, 851,009.70 and 358,770.16 is: 494,903.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    616,921.48 : 851,009.70 = 358,770.16 : x
  2. Step 2: Convert to fraction form
    616,921.48/851,009.70 = 358,770.16/x
  3. Step 3: Cross multiply
    616,921.48x = 851,009.70 × 358,770.16
  4. Step 4: Simplify right side
    616,921.48x = 305,316,886,230.55
  5. Step 5: Solve for x
    x = 305,316,886,230.55/616,921.48
  6. Step 6: Final answer
    x = 494,903.96

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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.