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Finding the Fourth Proportional to 431,152.20, 646,728.30 and 386,051.40

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Solution

The fourth proportional to 431,152.20, 646,728.30 and 386,051.40 is: 579,077.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,152.20 : 646,728.30 = 386,051.40 : x
  2. Step 2: Convert to fraction form
    431,152.20/646,728.30 = 386,051.40/x
  3. Step 3: Cross multiply
    431,152.20x = 646,728.30 × 386,051.40
  4. Step 4: Simplify right side
    431,152.20x = 249,670,365,634.62
  5. Step 5: Solve for x
    x = 249,670,365,634.62/431,152.20
  6. Step 6: Final answer
    x = 579,077.10

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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.