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Finding the Fourth Proportional to 402,507.64, 555,448.81 and 230,419.90

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Solution

The fourth proportional to 402,507.64, 555,448.81 and 230,419.90 is: 317,972.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,507.64 : 555,448.81 = 230,419.90 : x
  2. Step 2: Convert to fraction form
    402,507.64/555,448.81 = 230,419.90/x
  3. Step 3: Cross multiply
    402,507.64x = 555,448.81 × 230,419.90
  4. Step 4: Simplify right side
    402,507.64x = 127,986,459,255.32
  5. Step 5: Solve for x
    x = 127,986,459,255.32/402,507.64
  6. Step 6: Final answer
    x = 317,972.75

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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.