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Finding the Fourth Proportional to 630,790.60, 870,374.60 and 358,842.61

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Solution

The fourth proportional to 630,790.60, 870,374.60 and 358,842.61 is: 495,136.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,790.60 : 870,374.60 = 358,842.61 : x
  2. Step 2: Convert to fraction form
    630,790.60/870,374.60 = 358,842.61/x
  3. Step 3: Cross multiply
    630,790.60x = 870,374.60 × 358,842.61
  4. Step 4: Simplify right side
    630,790.60x = 312,327,491,347.49
  5. Step 5: Solve for x
    x = 312,327,491,347.49/630,790.60
  6. Step 6: Final answer
    x = 495,136.57

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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.