Home / 912,920.90-1,369,505.88-380,317.28

Finding the Fourth Proportional to 912,920.90, 1,369,505.88 and 380,317.28

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Solution

The fourth proportional to 912,920.90, 1,369,505.88 and 380,317.28 is: 570,527.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,920.90 : 1,369,505.88 = 380,317.28 : x
  2. Step 2: Convert to fraction form
    912,920.90/1,369,505.88 = 380,317.28/x
  3. Step 3: Cross multiply
    912,920.90x = 1,369,505.88 × 380,317.28
  4. Step 4: Simplify right side
    912,920.90x = 520,846,744,378.08
  5. Step 5: Solve for x
    x = 520,846,744,378.08/912,920.90
  6. Step 6: Final answer
    x = 570,527.79

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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.