Home / 645,321.64-890,507.24-358,835.58

Finding the Fourth Proportional to 645,321.64, 890,507.24 and 358,835.58

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Solution

The fourth proportional to 645,321.64, 890,507.24 and 358,835.58 is: 495,172.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,321.64 : 890,507.24 = 358,835.58 : x
  2. Step 2: Convert to fraction form
    645,321.64/890,507.24 = 358,835.58/x
  3. Step 3: Cross multiply
    645,321.64x = 890,507.24 × 358,835.58
  4. Step 4: Simplify right side
    645,321.64x = 319,545,681,959.60
  5. Step 5: Solve for x
    x = 319,545,681,959.60/645,321.64
  6. Step 6: Final answer
    x = 495,172.74

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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.