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Finding the Fourth Proportional to 630,508.08, 870,230.64 and 385,534.72

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Solution

The fourth proportional to 630,508.08, 870,230.64 and 385,534.72 is: 532,117.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,508.08 : 870,230.64 = 385,534.72 : x
  2. Step 2: Convert to fraction form
    630,508.08/870,230.64 = 385,534.72/x
  3. Step 3: Cross multiply
    630,508.08x = 870,230.64 × 385,534.72
  4. Step 4: Simplify right side
    630,508.08x = 335,504,126,127.82
  5. Step 5: Solve for x
    x = 335,504,126,127.82/630,508.08
  6. Step 6: Final answer
    x = 532,117.09

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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.