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Finding the Fourth Proportional to 642,673.53, 963,341.64 and 215,892.63

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Solution

The fourth proportional to 642,673.53, 963,341.64 and 215,892.63 is: 323,614.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,673.53 : 963,341.64 = 215,892.63 : x
  2. Step 2: Convert to fraction form
    642,673.53/963,341.64 = 215,892.63/x
  3. Step 3: Cross multiply
    642,673.53x = 963,341.64 × 215,892.63
  4. Step 4: Simplify right side
    642,673.53x = 207,978,360,248.11
  5. Step 5: Solve for x
    x = 207,978,360,248.11/642,673.53
  6. Step 6: Final answer
    x = 323,614.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.