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Finding the Fourth Proportional to 630,419.06, 870,002.70 and 358,511.78

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Solution

The fourth proportional to 630,419.06, 870,002.70 and 358,511.78 is: 494,760.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,419.06 : 870,002.70 = 358,511.78 : x
  2. Step 2: Convert to fraction form
    630,419.06/870,002.70 = 358,511.78/x
  3. Step 3: Cross multiply
    630,419.06x = 870,002.70 × 358,511.78
  4. Step 4: Simplify right side
    630,419.06x = 311,906,216,581.81
  5. Step 5: Solve for x
    x = 311,906,216,581.81/630,419.06
  6. Step 6: Final answer
    x = 494,760.13

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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.