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Finding the Fourth Proportional to 553,423.07, 830,134.83 and 427,247.53

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Solution

The fourth proportional to 553,423.07, 830,134.83 and 427,247.53 is: 640,871.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,423.07 : 830,134.83 = 427,247.53 : x
  2. Step 2: Convert to fraction form
    553,423.07/830,134.83 = 427,247.53/x
  3. Step 3: Cross multiply
    553,423.07x = 830,134.83 × 427,247.53
  4. Step 4: Simplify right side
    553,423.07x = 354,673,055,684.47
  5. Step 5: Solve for x
    x = 354,673,055,684.47/553,423.07
  6. Step 6: Final answer
    x = 640,871.47

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Double scale
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Similar ratio
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1.5x scale

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.