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Finding the Fourth Proportional to 399,079.30, 550,741.10 and 217,802.87

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Solution

The fourth proportional to 399,079.30, 550,741.10 and 217,802.87 is: 300,574.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,079.30 : 550,741.10 = 217,802.87 : x
  2. Step 2: Convert to fraction form
    399,079.30/550,741.10 = 217,802.87/x
  3. Step 3: Cross multiply
    399,079.30x = 550,741.10 × 217,802.87
  4. Step 4: Simplify right side
    399,079.30x = 119,952,988,364.24
  5. Step 5: Solve for x
    x = 119,952,988,364.24/399,079.30
  6. Step 6: Final answer
    x = 300,574.32

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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.