Home / 645,274.36-890,499.18-358,806.52

Finding the Fourth Proportional to 645,274.36, 890,499.18 and 358,806.52

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Solution

The fourth proportional to 645,274.36, 890,499.18 and 358,806.52 is: 495,164.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,274.36 : 890,499.18 = 358,806.52 : x
  2. Step 2: Convert to fraction form
    645,274.36/890,499.18 = 358,806.52/x
  3. Step 3: Cross multiply
    645,274.36x = 890,499.18 × 358,806.52
  4. Step 4: Simplify right side
    645,274.36x = 319,516,911,838.65
  5. Step 5: Solve for x
    x = 319,516,911,838.65/645,274.36
  6. Step 6: Final answer
    x = 495,164.43

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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.