Home / 769,276.90-1,154,128.65-320,209.30

Finding the Fourth Proportional to 769,276.90, 1,154,128.65 and 320,209.30

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Solution

The fourth proportional to 769,276.90, 1,154,128.65 and 320,209.30 is: 480,402.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,276.90 : 1,154,128.65 = 320,209.30 : x
  2. Step 2: Convert to fraction form
    769,276.90/1,154,128.65 = 320,209.30/x
  3. Step 3: Cross multiply
    769,276.90x = 1,154,128.65 × 320,209.30
  4. Step 4: Simplify right side
    769,276.90x = 369,562,727,126.45
  5. Step 5: Solve for x
    x = 369,562,727,126.45/769,276.90
  6. Step 6: Final answer
    x = 480,402.74

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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.