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Finding the Fourth Proportional to 400,008.40, 598,457.40 and 260,040.40

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Solution

The fourth proportional to 400,008.40, 598,457.40 and 260,040.40 is: 389,049.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,008.40 : 598,457.40 = 260,040.40 : x
  2. Step 2: Convert to fraction form
    400,008.40/598,457.40 = 260,040.40/x
  3. Step 3: Cross multiply
    400,008.40x = 598,457.40 × 260,040.40
  4. Step 4: Simplify right side
    400,008.40x = 155,623,101,678.96
  5. Step 5: Solve for x
    x = 155,623,101,678.96/400,008.40
  6. Step 6: Final answer
    x = 389,049.58

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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.