Home / 645,190.50-890,320.77-358,700.34

Finding the Fourth Proportional to 645,190.50, 890,320.77 and 358,700.34

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Solution

The fourth proportional to 645,190.50, 890,320.77 and 358,700.34 is: 494,983.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,190.50 : 890,320.77 = 358,700.34 : x
  2. Step 2: Convert to fraction form
    645,190.50/890,320.77 = 358,700.34/x
  3. Step 3: Cross multiply
    645,190.50x = 890,320.77 × 358,700.34
  4. Step 4: Simplify right side
    645,190.50x = 319,358,362,908.06
  5. Step 5: Solve for x
    x = 319,358,362,908.06/645,190.50
  6. Step 6: Final answer
    x = 494,983.05

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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.