Home / 645,129.89-890,228.81-358,632.53

Finding the Fourth Proportional to 645,129.89, 890,228.81 and 358,632.53

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Solution

The fourth proportional to 645,129.89, 890,228.81 and 358,632.53 is: 494,884.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,129.89 : 890,228.81 = 358,632.53 : x
  2. Step 2: Convert to fraction form
    645,129.89/890,228.81 = 358,632.53/x
  3. Step 3: Cross multiply
    645,129.89x = 890,228.81 × 358,632.53
  4. Step 4: Simplify right side
    645,129.89x = 319,265,010,409.19
  5. Step 5: Solve for x
    x = 319,265,010,409.19/645,129.89
  6. Step 6: Final answer
    x = 494,884.85

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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.