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Finding the Fourth Proportional to 645,268.68, 890,390.16 and 358,752.24

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Solution

The fourth proportional to 645,268.68, 890,390.16 and 358,752.24 is: 495,033.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,268.68 : 890,390.16 = 358,752.24 : x
  2. Step 2: Convert to fraction form
    645,268.68/890,390.16 = 358,752.24/x
  3. Step 3: Cross multiply
    645,268.68x = 890,390.16 × 358,752.24
  4. Step 4: Simplify right side
    645,268.68x = 319,429,464,373.96
  5. Step 5: Solve for x
    x = 319,429,464,373.96/645,268.68
  6. Step 6: Final answer
    x = 495,033.27

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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.