Home / 491,011.20-736,516.80-420,152.40

Finding the Fourth Proportional to 491,011.20, 736,516.80 and 420,152.40

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Solution

The fourth proportional to 491,011.20, 736,516.80 and 420,152.40 is: 630,228.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,011.20 : 736,516.80 = 420,152.40 : x
  2. Step 2: Convert to fraction form
    491,011.20/736,516.80 = 420,152.40/x
  3. Step 3: Cross multiply
    491,011.20x = 736,516.80 × 420,152.40
  4. Step 4: Simplify right side
    491,011.20x = 309,449,301,160.32
  5. Step 5: Solve for x
    x = 309,449,301,160.32/491,011.20
  6. Step 6: Final answer
    x = 630,228.60

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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.