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Finding the Fourth Proportional to 542,130.78, 748,146.75 and 300,417.39

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Solution

The fourth proportional to 542,130.78, 748,146.75 and 300,417.39 is: 414,579.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,130.78 : 748,146.75 = 300,417.39 : x
  2. Step 2: Convert to fraction form
    542,130.78/748,146.75 = 300,417.39/x
  3. Step 3: Cross multiply
    542,130.78x = 748,146.75 × 300,417.39
  4. Step 4: Simplify right side
    542,130.78x = 224,756,293,971.98
  5. Step 5: Solve for x
    x = 224,756,293,971.98/542,130.78
  6. Step 6: Final answer
    x = 414,579.47

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Double scale
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Similar ratio
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1.5x scale

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.