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Finding the Fourth Proportional to 630,711.15, 947,340.18 and 378,470.76

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Solution

The fourth proportional to 630,711.15, 947,340.18 and 378,470.76 is: 568,470.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,711.15 : 947,340.18 = 378,470.76 : x
  2. Step 2: Convert to fraction form
    630,711.15/947,340.18 = 378,470.76/x
  3. Step 3: Cross multiply
    630,711.15x = 947,340.18 × 378,470.76
  4. Step 4: Simplify right side
    630,711.15x = 358,540,557,903.14
  5. Step 5: Solve for x
    x = 358,540,557,903.14/630,711.15
  6. Step 6: Final answer
    x = 568,470.30

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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.