Home / 912,425.20-1,369,415.40-407,762.80

Finding the Fourth Proportional to 912,425.20, 1,369,415.40 and 407,762.80

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Solution

The fourth proportional to 912,425.20, 1,369,415.40 and 407,762.80 is: 611,991.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,425.20 : 1,369,415.40 = 407,762.80 : x
  2. Step 2: Convert to fraction form
    912,425.20/1,369,415.40 = 407,762.80/x
  3. Step 3: Cross multiply
    912,425.20x = 1,369,415.40 × 407,762.80
  4. Step 4: Simplify right side
    912,425.20x = 558,396,657,867.12
  5. Step 5: Solve for x
    x = 558,396,657,867.12/912,425.20
  6. Step 6: Final answer
    x = 611,991.71

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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.