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Finding the Fourth Proportional to 630,431.30, 869,950.04 and 343,945.10

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Solution

The fourth proportional to 630,431.30, 869,950.04 and 343,945.10 is: 474,619.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,431.30 : 869,950.04 = 343,945.10 : x
  2. Step 2: Convert to fraction form
    630,431.30/869,950.04 = 343,945.10/x
  3. Step 3: Cross multiply
    630,431.30x = 869,950.04 × 343,945.10
  4. Step 4: Simplify right side
    630,431.30x = 299,215,053,502.80
  5. Step 5: Solve for x
    x = 299,215,053,502.80/630,431.30
  6. Step 6: Final answer
    x = 474,619.60

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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.