Home / 912,423.20-1,369,412.40-407,760.80

Finding the Fourth Proportional to 912,423.20, 1,369,412.40 and 407,760.80

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Solution

The fourth proportional to 912,423.20, 1,369,412.40 and 407,760.80 is: 611,988.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,423.20 : 1,369,412.40 = 407,760.80 : x
  2. Step 2: Convert to fraction form
    912,423.20/1,369,412.40 = 407,760.80/x
  3. Step 3: Cross multiply
    912,423.20x = 1,369,412.40 × 407,760.80
  4. Step 4: Simplify right side
    912,423.20x = 558,392,695,753.92
  5. Step 5: Solve for x
    x = 558,392,695,753.92/912,423.20
  6. Step 6: Final answer
    x = 611,988.71

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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.