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Finding the Fourth Proportional to 630,918.54, 870,717.27 and 358,997.88

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Solution

The fourth proportional to 630,918.54, 870,717.27 and 358,997.88 is: 495,445.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,918.54 : 870,717.27 = 358,997.88 : x
  2. Step 2: Convert to fraction form
    630,918.54/870,717.27 = 358,997.88/x
  3. Step 3: Cross multiply
    630,918.54x = 870,717.27 × 358,997.88
  4. Step 4: Simplify right side
    630,918.54x = 312,585,654,009.39
  5. Step 5: Solve for x
    x = 312,585,654,009.39/630,918.54
  6. Step 6: Final answer
    x = 495,445.35

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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.