Home / 645,127.89-890,226.05-358,630.53

Finding the Fourth Proportional to 645,127.89, 890,226.05 and 358,630.53

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Solution

The fourth proportional to 645,127.89, 890,226.05 and 358,630.53 is: 494,882.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,127.89 : 890,226.05 = 358,630.53 : x
  2. Step 2: Convert to fraction form
    645,127.89/890,226.05 = 358,630.53/x
  3. Step 3: Cross multiply
    645,127.89x = 890,226.05 × 358,630.53
  4. Step 4: Simplify right side
    645,127.89x = 319,262,235,680.18
  5. Step 5: Solve for x
    x = 319,262,235,680.18/645,127.89
  6. Step 6: Final answer
    x = 494,882.09

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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.