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Finding the Fourth Proportional to 606,985.20, 910,477.80 and 291,279.60

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Solution

The fourth proportional to 606,985.20, 910,477.80 and 291,279.60 is: 436,919.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,985.20 : 910,477.80 = 291,279.60 : x
  2. Step 2: Convert to fraction form
    606,985.20/910,477.80 = 291,279.60/x
  3. Step 3: Cross multiply
    606,985.20x = 910,477.80 × 291,279.60
  4. Step 4: Simplify right side
    606,985.20x = 265,203,609,392.88
  5. Step 5: Solve for x
    x = 265,203,609,392.88/606,985.20
  6. Step 6: Final answer
    x = 436,919.40

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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.