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Finding the Fourth Proportional to 645,323.65, 890,510.01 and 358,837.57

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Solution

The fourth proportional to 645,323.65, 890,510.01 and 358,837.57 is: 495,175.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,323.65 : 890,510.01 = 358,837.57 : x
  2. Step 2: Convert to fraction form
    645,323.65/890,510.01 = 358,837.57/x
  3. Step 3: Cross multiply
    645,323.65x = 890,510.01 × 358,837.57
  4. Step 4: Simplify right side
    645,323.65x = 319,548,448,049.08
  5. Step 5: Solve for x
    x = 319,548,448,049.08/645,323.65
  6. Step 6: Final answer
    x = 495,175.48

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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.