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Finding the Fourth Proportional to 372,457.80, 558,686.70 and 135,970.20

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Solution

The fourth proportional to 372,457.80, 558,686.70 and 135,970.20 is: 203,955.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,457.80 : 558,686.70 = 135,970.20 : x
  2. Step 2: Convert to fraction form
    372,457.80/558,686.70 = 135,970.20/x
  3. Step 3: Cross multiply
    372,457.80x = 558,686.70 × 135,970.20
  4. Step 4: Simplify right side
    372,457.80x = 75,964,742,336.34
  5. Step 5: Solve for x
    x = 75,964,742,336.34/372,457.80
  6. Step 6: Final answer
    x = 203,955.30

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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.