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Finding the Fourth Proportional to 569,683.40, 786,131.30 and 311,509.12

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Solution

The fourth proportional to 569,683.40, 786,131.30 and 311,509.12 is: 429,865.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    569,683.40 : 786,131.30 = 311,509.12 : x
  2. Step 2: Convert to fraction form
    569,683.40/786,131.30 = 311,509.12/x
  3. Step 3: Cross multiply
    569,683.40x = 786,131.30 × 311,509.12
  4. Step 4: Simplify right side
    569,683.40x = 244,887,069,467.46
  5. Step 5: Solve for x
    x = 244,887,069,467.46/569,683.40
  6. Step 6: Final answer
    x = 429,865.20

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.