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Finding the Fourth Proportional to 630,285.76, 869,799.90 and 343,807.12

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Solution

The fourth proportional to 630,285.76, 869,799.90 and 343,807.12 is: 474,456.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,285.76 : 869,799.90 = 343,807.12 : x
  2. Step 2: Convert to fraction form
    630,285.76/869,799.90 = 343,807.12/x
  3. Step 3: Cross multiply
    630,285.76x = 869,799.90 × 343,807.12
  4. Step 4: Simplify right side
    630,285.76x = 299,043,398,595.29
  5. Step 5: Solve for x
    x = 299,043,398,595.29/630,285.76
  6. Step 6: Final answer
    x = 474,456.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.