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Finding the Fourth Proportional to 542,840.80, 749,124.80 and 301,139.20

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Solution

The fourth proportional to 542,840.80, 749,124.80 and 301,139.20 is: 415,574.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,840.80 : 749,124.80 = 301,139.20 : x
  2. Step 2: Convert to fraction form
    542,840.80/749,124.80 = 301,139.20/x
  3. Step 3: Cross multiply
    542,840.80x = 749,124.80 × 301,139.20
  4. Step 4: Simplify right side
    542,840.80x = 225,590,842,972.16
  5. Step 5: Solve for x
    x = 225,590,842,972.16/542,840.80
  6. Step 6: Final answer
    x = 415,574.59

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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.