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Finding the Fourth Proportional to 545,628, 753,071.22 and 307,164

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Solution

The fourth proportional to 545,628, 753,071.22 and 307,164 is: 423,945.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,628 : 753,071.22 = 307,164 : x
  2. Step 2: Convert to fraction form
    545,628/753,071.22 = 307,164/x
  3. Step 3: Cross multiply
    545,628x = 753,071.22 × 307,164
  4. Step 4: Simplify right side
    545,628x = 231,316,368,220.08
  5. Step 5: Solve for x
    x = 231,316,368,220.08/545,628
  6. Step 6: Final answer
    x = 423,945.19

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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.