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Finding the Fourth Proportional to 542,011.15, 812,129.80 and 328,130.79

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Solution

The fourth proportional to 542,011.15, 812,129.80 and 328,130.79 is: 491,659.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,011.15 : 812,129.80 = 328,130.79 : x
  2. Step 2: Convert to fraction form
    542,011.15/812,129.80 = 328,130.79/x
  3. Step 3: Cross multiply
    542,011.15x = 812,129.80 × 328,130.79
  4. Step 4: Simplify right side
    542,011.15x = 266,484,792,856.54
  5. Step 5: Solve for x
    x = 266,484,792,856.54/542,011.15
  6. Step 6: Final answer
    x = 491,659.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.