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Finding the Fourth Proportional to 549,908.80, 824,863.20 and 455,430.40

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Solution

The fourth proportional to 549,908.80, 824,863.20 and 455,430.40 is: 683,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    549,908.80 : 824,863.20 = 455,430.40 : x
  2. Step 2: Convert to fraction form
    549,908.80/824,863.20 = 455,430.40/x
  3. Step 3: Cross multiply
    549,908.80x = 824,863.20 × 455,430.40
  4. Step 4: Simplify right side
    549,908.80x = 375,667,777,121.28
  5. Step 5: Solve for x
    x = 375,667,777,121.28/549,908.80
  6. Step 6: Final answer
    x = 683,145.60

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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.