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Finding the Fourth Proportional to 630,418.56, 870,002.01 and 358,511.28

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Solution

The fourth proportional to 630,418.56, 870,002.01 and 358,511.28 is: 494,759.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,418.56 : 870,002.01 = 358,511.28 : x
  2. Step 2: Convert to fraction form
    630,418.56/870,002.01 = 358,511.28/x
  3. Step 3: Cross multiply
    630,418.56x = 870,002.01 × 358,511.28
  4. Step 4: Simplify right side
    630,418.56x = 311,905,534,207.67
  5. Step 5: Solve for x
    x = 311,905,534,207.67/630,418.56
  6. Step 6: Final answer
    x = 494,759.44

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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.