Home / 645,105.60-890,299.59-358,652.34

Finding the Fourth Proportional to 645,105.60, 890,299.59 and 358,652.34

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Solution

The fourth proportional to 645,105.60, 890,299.59 and 358,652.34 is: 494,970.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,105.60 : 890,299.59 = 358,652.34 : x
  2. Step 2: Convert to fraction form
    645,105.60/890,299.59 = 358,652.34/x
  3. Step 3: Cross multiply
    645,105.60x = 890,299.59 × 358,652.34
  4. Step 4: Simplify right side
    645,105.60x = 319,308,031,254.54
  5. Step 5: Solve for x
    x = 319,308,031,254.54/645,105.60
  6. Step 6: Final answer
    x = 494,970.17

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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.