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Finding the Fourth Proportional to 630,428.94, 870,016.36 and 358,521.66

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Solution

The fourth proportional to 630,428.94, 870,016.36 and 358,521.66 is: 494,773.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,428.94 : 870,016.36 = 358,521.66 : x
  2. Step 2: Convert to fraction form
    630,428.94/870,016.36 = 358,521.66/x
  3. Step 3: Cross multiply
    630,428.94x = 870,016.36 × 358,521.66
  4. Step 4: Simplify right side
    630,428.94x = 311,919,709,614.36
  5. Step 5: Solve for x
    x = 311,919,709,614.36/630,428.94
  6. Step 6: Final answer
    x = 494,773.78

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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.