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Finding the Fourth Proportional to 394,740.80, 592,111.20 and 145,390.40

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Solution

The fourth proportional to 394,740.80, 592,111.20 and 145,390.40 is: 218,085.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,740.80 : 592,111.20 = 145,390.40 : x
  2. Step 2: Convert to fraction form
    394,740.80/592,111.20 = 145,390.40/x
  3. Step 3: Cross multiply
    394,740.80x = 592,111.20 × 145,390.40
  4. Step 4: Simplify right side
    394,740.80x = 86,087,284,212.48
  5. Step 5: Solve for x
    x = 86,087,284,212.48/394,740.80
  6. Step 6: Final answer
    x = 218,085.60

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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.