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Finding the Fourth Proportional to 510,124.60, 765,186.90 and 431,392.60

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Solution

The fourth proportional to 510,124.60, 765,186.90 and 431,392.60 is: 647,088.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    510,124.60 : 765,186.90 = 431,392.60 : x
  2. Step 2: Convert to fraction form
    510,124.60/765,186.90 = 431,392.60/x
  3. Step 3: Cross multiply
    510,124.60x = 765,186.90 × 431,392.60
  4. Step 4: Simplify right side
    510,124.60x = 330,095,966,276.94
  5. Step 5: Solve for x
    x = 330,095,966,276.94/510,124.60
  6. Step 6: Final answer
    x = 647,088.90

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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.