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Finding the Fourth Proportional to 630,607.72, 870,267 and 355,060.45

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Solution

The fourth proportional to 630,607.72, 870,267 and 355,060.45 is: 489,999.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,607.72 : 870,267 = 355,060.45 : x
  2. Step 2: Convert to fraction form
    630,607.72/870,267 = 355,060.45/x
  3. Step 3: Cross multiply
    630,607.72x = 870,267 × 355,060.45
  4. Step 4: Simplify right side
    630,607.72x = 308,997,392,640.15
  5. Step 5: Solve for x
    x = 308,997,392,640.15/630,607.72
  6. Step 6: Final answer
    x = 489,999.38

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1.5x scale

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.