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Finding the Fourth Proportional to 630,248.52, 869,754.70 and 343,778.88

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Solution

The fourth proportional to 630,248.52, 869,754.70 and 343,778.88 is: 474,421.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,248.52 : 869,754.70 = 343,778.88 : x
  2. Step 2: Convert to fraction form
    630,248.52/869,754.70 = 343,778.88/x
  3. Step 3: Cross multiply
    630,248.52x = 869,754.70 × 343,778.88
  4. Step 4: Simplify right side
    630,248.52x = 299,003,296,640.74
  5. Step 5: Solve for x
    x = 299,003,296,640.74/630,248.52
  6. Step 6: Final answer
    x = 474,421.26

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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.