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Finding the Fourth Proportional to 630,335.21, 869,903.73 and 358,428.42

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Solution

The fourth proportional to 630,335.21, 869,903.73 and 358,428.42 is: 494,654.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,335.21 : 869,903.73 = 358,428.42 : x
  2. Step 2: Convert to fraction form
    630,335.21/869,903.73 = 358,428.42/x
  3. Step 3: Cross multiply
    630,335.21x = 869,903.73 × 358,428.42
  4. Step 4: Simplify right side
    630,335.21x = 311,798,219,496.01
  5. Step 5: Solve for x
    x = 311,798,219,496.01/630,335.21
  6. Step 6: Final answer
    x = 494,654.62

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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.