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Finding the Fourth Proportional to 350,459.10, 525,688.65 and 128,814.30

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Solution

The fourth proportional to 350,459.10, 525,688.65 and 128,814.30 is: 193,221.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    350,459.10 : 525,688.65 = 128,814.30 : x
  2. Step 2: Convert to fraction form
    350,459.10/525,688.65 = 128,814.30/x
  3. Step 3: Cross multiply
    350,459.10x = 525,688.65 × 128,814.30
  4. Step 4: Simplify right side
    350,459.10x = 67,716,215,467.70
  5. Step 5: Solve for x
    x = 67,716,215,467.70/350,459.10
  6. Step 6: Final answer
    x = 193,221.45

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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.