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Finding the Fourth Proportional to 459,085.40, 688,628.10 and 279,459.80

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Solution

The fourth proportional to 459,085.40, 688,628.10 and 279,459.80 is: 419,189.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,085.40 : 688,628.10 = 279,459.80 : x
  2. Step 2: Convert to fraction form
    459,085.40/688,628.10 = 279,459.80/x
  3. Step 3: Cross multiply
    459,085.40x = 688,628.10 × 279,459.80
  4. Step 4: Simplify right side
    459,085.40x = 192,443,871,100.38
  5. Step 5: Solve for x
    x = 192,443,871,100.38/459,085.40
  6. Step 6: Final answer
    x = 419,189.70

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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.