Home / 690,802.39-1,036,438.94-421,469.74

Finding the Fourth Proportional to 690,802.39, 1,036,438.94 and 421,469.74

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Solution

The fourth proportional to 690,802.39, 1,036,438.94 and 421,469.74 is: 632,348.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,802.39 : 1,036,438.94 = 421,469.74 : x
  2. Step 2: Convert to fraction form
    690,802.39/1,036,438.94 = 421,469.74/x
  3. Step 3: Cross multiply
    690,802.39x = 1,036,438.94 × 421,469.74
  4. Step 4: Simplify right side
    690,802.39x = 436,827,650,567.68
  5. Step 5: Solve for x
    x = 436,827,650,567.68/690,802.39
  6. Step 6: Final answer
    x = 632,348.20

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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.