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Finding the Fourth Proportional to 640,851.60, 961,277.40 and 309,075.60

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Solution

The fourth proportional to 640,851.60, 961,277.40 and 309,075.60 is: 463,613.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,851.60 : 961,277.40 = 309,075.60 : x
  2. Step 2: Convert to fraction form
    640,851.60/961,277.40 = 309,075.60/x
  3. Step 3: Cross multiply
    640,851.60x = 961,277.40 × 309,075.60
  4. Step 4: Simplify right side
    640,851.60x = 297,107,389,171.44
  5. Step 5: Solve for x
    x = 297,107,389,171.44/640,851.60
  6. Step 6: Final answer
    x = 463,613.40

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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.