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Finding the Fourth Proportional to 630,316.78, 869,836.08 and 343,836.86

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Solution

The fourth proportional to 630,316.78, 869,836.08 and 343,836.86 is: 474,494.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,316.78 : 869,836.08 = 343,836.86 : x
  2. Step 2: Convert to fraction form
    630,316.78/869,836.08 = 343,836.86/x
  3. Step 3: Cross multiply
    630,316.78x = 869,836.08 × 343,836.86
  4. Step 4: Simplify right side
    630,316.78x = 299,081,706,461.91
  5. Step 5: Solve for x
    x = 299,081,706,461.91/630,316.78
  6. Step 6: Final answer
    x = 474,494.28

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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.