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Finding the Fourth Proportional to 502.79, 696.81 and 495.10

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Solution

The fourth proportional to 502.79, 696.81 and 495.10 is: 686.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.79 : 696.81 = 495.10 : x
  2. Step 2: Convert to fraction form
    502.79/696.81 = 495.10/x
  3. Step 3: Cross multiply
    502.79x = 696.81 × 495.10
  4. Step 4: Simplify right side
    502.79x = 344,990.57
  5. Step 5: Solve for x
    x = 344,990.57/502.79
  6. Step 6: Final answer
    x = 686.16

Related Problems

Find fourth proportional to 251.39, 348.40 and 247.55
Half scale
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Double scale
Find fourth proportional to 503.79, 698.19 and 496.10
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.