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Finding the Fourth Proportional to 522,051.40, 783,077.10 and 420,574.60

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Solution

The fourth proportional to 522,051.40, 783,077.10 and 420,574.60 is: 630,861.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,051.40 : 783,077.10 = 420,574.60 : x
  2. Step 2: Convert to fraction form
    522,051.40/783,077.10 = 420,574.60/x
  3. Step 3: Cross multiply
    522,051.40x = 783,077.10 × 420,574.60
  4. Step 4: Simplify right side
    522,051.40x = 329,342,338,101.66
  5. Step 5: Solve for x
    x = 329,342,338,101.66/522,051.40
  6. Step 6: Final answer
    x = 630,861.90

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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.