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Finding the Fourth Proportional to 542,133.70, 748,148.90 and 300,420.31

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Solution

The fourth proportional to 542,133.70, 748,148.90 and 300,420.31 is: 414,582.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,133.70 : 748,148.90 = 300,420.31 : x
  2. Step 2: Convert to fraction form
    542,133.70/748,148.90 = 300,420.31/x
  3. Step 3: Cross multiply
    542,133.70x = 748,148.90 × 300,420.31
  4. Step 4: Simplify right side
    542,133.70x = 224,759,124,184.33
  5. Step 5: Solve for x
    x = 224,759,124,184.33/542,133.70
  6. Step 6: Final answer
    x = 414,582.46

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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.