Home / 1,292.50-1,938.28-470.58

Finding the Fourth Proportional to 1,292.50, 1,938.28 and 470.58

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Solution

The fourth proportional to 1,292.50, 1,938.28 and 470.58 is: 705.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.50 : 1,938.28 = 470.58 : x
  2. Step 2: Convert to fraction form
    1,292.50/1,938.28 = 470.58/x
  3. Step 3: Cross multiply
    1,292.50x = 1,938.28 × 470.58
  4. Step 4: Simplify right side
    1,292.50x = 912,113.45
  5. Step 5: Solve for x
    x = 912,113.45/1,292.50
  6. Step 6: Final answer
    x = 705.70

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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.