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Finding the Fourth Proportional to 630,360.70, 869,899.80 and 343,886.78

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Solution

The fourth proportional to 630,360.70, 869,899.80 and 343,886.78 is: 474,564.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,360.70 : 869,899.80 = 343,886.78 : x
  2. Step 2: Convert to fraction form
    630,360.70/869,899.80 = 343,886.78/x
  3. Step 3: Cross multiply
    630,360.70x = 869,899.80 × 343,886.78
  4. Step 4: Simplify right side
    630,360.70x = 299,147,044,608.97
  5. Step 5: Solve for x
    x = 299,147,044,608.97/630,360.70
  6. Step 6: Final answer
    x = 474,564.87

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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.