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Finding the Fourth Proportional to 630,290.70, 869,799.74 and 343,810.78

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Solution

The fourth proportional to 630,290.70, 869,799.74 and 343,810.78 is: 474,458.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,290.70 : 869,799.74 = 343,810.78 : x
  2. Step 2: Convert to fraction form
    630,290.70/869,799.74 = 343,810.78/x
  3. Step 3: Cross multiply
    630,290.70x = 869,799.74 × 343,810.78
  4. Step 4: Simplify right side
    630,290.70x = 299,046,523,159.64
  5. Step 5: Solve for x
    x = 299,046,523,159.64/630,290.70
  6. Step 6: Final answer
    x = 474,458.09

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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.