Home / 495,719.40-742,759.90-421,991.40

Finding the Fourth Proportional to 495,719.40, 742,759.90 and 421,991.40

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Solution

The fourth proportional to 495,719.40, 742,759.90 and 421,991.40 is: 632,289.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,719.40 : 742,759.90 = 421,991.40 : x
  2. Step 2: Convert to fraction form
    495,719.40/742,759.90 = 421,991.40/x
  3. Step 3: Cross multiply
    495,719.40x = 742,759.90 × 421,991.40
  4. Step 4: Simplify right side
    495,719.40x = 313,438,290,064.86
  5. Step 5: Solve for x
    x = 313,438,290,064.86/495,719.40
  6. Step 6: Final answer
    x = 632,289.74

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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.