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Finding the Fourth Proportional to 630,470.72, 870,045.12 and 358,538.58

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Solution

The fourth proportional to 630,470.72, 870,045.12 and 358,538.58 is: 494,780.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,470.72 : 870,045.12 = 358,538.58 : x
  2. Step 2: Convert to fraction form
    630,470.72/870,045.12 = 358,538.58/x
  3. Step 3: Cross multiply
    630,470.72x = 870,045.12 × 358,538.58
  4. Step 4: Simplify right side
    630,470.72x = 311,944,741,860.73
  5. Step 5: Solve for x
    x = 311,944,741,860.73/630,470.72
  6. Step 6: Final answer
    x = 494,780.69

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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.