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Finding the Fourth Proportional to 385,870.43, 578,827.52 and 119,668.79

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Solution

The fourth proportional to 385,870.43, 578,827.52 and 119,668.79 is: 179,509.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,870.43 : 578,827.52 = 119,668.79 : x
  2. Step 2: Convert to fraction form
    385,870.43/578,827.52 = 119,668.79/x
  3. Step 3: Cross multiply
    385,870.43x = 578,827.52 × 119,668.79
  4. Step 4: Simplify right side
    385,870.43x = 69,267,588,937.10
  5. Step 5: Solve for x
    x = 69,267,588,937.10/385,870.43
  6. Step 6: Final answer
    x = 179,509.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.