Home / 645,180.76-890,299.02-358,683.40

Finding the Fourth Proportional to 645,180.76, 890,299.02 and 358,683.40

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Solution

The fourth proportional to 645,180.76, 890,299.02 and 358,683.40 is: 494,955.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,180.76 : 890,299.02 = 358,683.40 : x
  2. Step 2: Convert to fraction form
    645,180.76/890,299.02 = 358,683.40/x
  3. Step 3: Cross multiply
    645,180.76x = 890,299.02 × 358,683.40
  4. Step 4: Simplify right side
    645,180.76x = 319,335,479,510.27
  5. Step 5: Solve for x
    x = 319,335,479,510.27/645,180.76
  6. Step 6: Final answer
    x = 494,955.06

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Double scale
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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.