Home / 485,566.72-669,702.24-315,855.04

Finding the Fourth Proportional to 485,566.72, 669,702.24 and 315,855.04

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Solution

The fourth proportional to 485,566.72, 669,702.24 and 315,855.04 is: 435,632.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,566.72 : 669,702.24 = 315,855.04 : x
  2. Step 2: Convert to fraction form
    485,566.72/669,702.24 = 315,855.04/x
  3. Step 3: Cross multiply
    485,566.72x = 669,702.24 × 315,855.04
  4. Step 4: Simplify right side
    485,566.72x = 211,528,827,803.29
  5. Step 5: Solve for x
    x = 211,528,827,803.29/485,566.72
  6. Step 6: Final answer
    x = 435,632.88

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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.