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Finding the Fourth Proportional to 558,390.60, 837,585.90 and 345,814.20

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Solution

The fourth proportional to 558,390.60, 837,585.90 and 345,814.20 is: 518,721.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,390.60 : 837,585.90 = 345,814.20 : x
  2. Step 2: Convert to fraction form
    558,390.60/837,585.90 = 345,814.20/x
  3. Step 3: Cross multiply
    558,390.60x = 837,585.90 × 345,814.20
  4. Step 4: Simplify right side
    558,390.60x = 289,649,097,939.78
  5. Step 5: Solve for x
    x = 289,649,097,939.78/558,390.60
  6. Step 6: Final answer
    x = 518,721.30

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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.