Home / 645,456.70-890,741.70-358,976.91

Finding the Fourth Proportional to 645,456.70, 890,741.70 and 358,976.91

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Solution

The fourth proportional to 645,456.70, 890,741.70 and 358,976.91 is: 495,394.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,456.70 : 890,741.70 = 358,976.91 : x
  2. Step 2: Convert to fraction form
    645,456.70/890,741.70 = 358,976.91/x
  3. Step 3: Cross multiply
    645,456.70x = 890,741.70 × 358,976.91
  4. Step 4: Simplify right side
    645,456.70x = 319,755,701,279.26
  5. Step 5: Solve for x
    x = 319,755,701,279.26/645,456.70
  6. Step 6: Final answer
    x = 495,394.51

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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.