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Finding the Fourth Proportional to 630,961.48, 870,728.82 and 404,607.88

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Solution

The fourth proportional to 630,961.48, 870,728.82 and 404,607.88 is: 558,360.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,961.48 : 870,728.82 = 404,607.88 : x
  2. Step 2: Convert to fraction form
    630,961.48/870,728.82 = 404,607.88/x
  3. Step 3: Cross multiply
    630,961.48x = 870,728.82 × 404,607.88
  4. Step 4: Simplify right side
    630,961.48x = 352,303,741,915.10
  5. Step 5: Solve for x
    x = 352,303,741,915.10/630,961.48
  6. Step 6: Final answer
    x = 558,360.14

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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.