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Finding the Fourth Proportional to 630,843.68, 870,553.08 and 358,905.72

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Solution

The fourth proportional to 630,843.68, 870,553.08 and 358,905.72 is: 495,283.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,843.68 : 870,553.08 = 358,905.72 : x
  2. Step 2: Convert to fraction form
    630,843.68/870,553.08 = 358,905.72/x
  3. Step 3: Cross multiply
    630,843.68x = 870,553.08 × 358,905.72
  4. Step 4: Simplify right side
    630,843.68x = 312,446,479,975.62
  5. Step 5: Solve for x
    x = 312,446,479,975.62/630,843.68
  6. Step 6: Final answer
    x = 495,283.53

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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.