Home / 912,718.20-1,369,854.90-408,055.80

Finding the Fourth Proportional to 912,718.20, 1,369,854.90 and 408,055.80

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Solution

The fourth proportional to 912,718.20, 1,369,854.90 and 408,055.80 is: 612,431.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,718.20 : 1,369,854.90 = 408,055.80 : x
  2. Step 2: Convert to fraction form
    912,718.20/1,369,854.90 = 408,055.80/x
  3. Step 3: Cross multiply
    912,718.20x = 1,369,854.90 × 408,055.80
  4. Step 4: Simplify right side
    912,718.20x = 558,977,237,103.42
  5. Step 5: Solve for x
    x = 558,977,237,103.42/912,718.20
  6. Step 6: Final answer
    x = 612,431.35

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Double scale
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Similar ratio
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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.