Home / 645,457.20-890,742.38-358,977.41

Finding the Fourth Proportional to 645,457.20, 890,742.38 and 358,977.41

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Solution

The fourth proportional to 645,457.20, 890,742.38 and 358,977.41 is: 495,395.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,457.20 : 890,742.38 = 358,977.41 : x
  2. Step 2: Convert to fraction form
    645,457.20/890,742.38 = 358,977.41/x
  3. Step 3: Cross multiply
    645,457.20x = 890,742.38 × 358,977.41
  4. Step 4: Simplify right side
    645,457.20x = 319,756,392,549.64
  5. Step 5: Solve for x
    x = 319,756,392,549.64/645,457.20
  6. Step 6: Final answer
    x = 495,395.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.