Home / 428,263.04-642,438.24-147,779.44

Finding the Fourth Proportional to 428,263.04, 642,438.24 and 147,779.44

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Solution

The fourth proportional to 428,263.04, 642,438.24 and 147,779.44 is: 221,684.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,263.04 : 642,438.24 = 147,779.44 : x
  2. Step 2: Convert to fraction form
    428,263.04/642,438.24 = 147,779.44/x
  3. Step 3: Cross multiply
    428,263.04x = 642,438.24 × 147,779.44
  4. Step 4: Simplify right side
    428,263.04x = 94,939,163,341.79
  5. Step 5: Solve for x
    x = 94,939,163,341.79/428,263.04
  6. Step 6: Final answer
    x = 221,684.23

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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.