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Finding the Fourth Proportional to 630,686.10, 870,349.23 and 344,212.50

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Solution

The fourth proportional to 630,686.10, 870,349.23 and 344,212.50 is: 475,014.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,686.10 : 870,349.23 = 344,212.50 : x
  2. Step 2: Convert to fraction form
    630,686.10/870,349.23 = 344,212.50/x
  3. Step 3: Cross multiply
    630,686.10x = 870,349.23 × 344,212.50
  4. Step 4: Simplify right side
    630,686.10x = 299,585,084,331.38
  5. Step 5: Solve for x
    x = 299,585,084,331.38/630,686.10
  6. Step 6: Final answer
    x = 475,014.57

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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.