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Finding the Fourth Proportional to 630,812.88, 870,534 and 344,358

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Solution

The fourth proportional to 630,812.88, 870,534 and 344,358 is: 475,220.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,812.88 : 870,534 = 344,358 : x
  2. Step 2: Convert to fraction form
    630,812.88/870,534 = 344,358/x
  3. Step 3: Cross multiply
    630,812.88x = 870,534 × 344,358
  4. Step 4: Simplify right side
    630,812.88x = 299,775,347,172
  5. Step 5: Solve for x
    x = 299,775,347,172/630,812.88
  6. Step 6: Final answer
    x = 475,220.71

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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.