Home / 645,445.45-890,702.07-358,959.37

Finding the Fourth Proportional to 645,445.45, 890,702.07 and 358,959.37

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Solution

The fourth proportional to 645,445.45, 890,702.07 and 358,959.37 is: 495,356.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,445.45 : 890,702.07 = 358,959.37 : x
  2. Step 2: Convert to fraction form
    645,445.45/890,702.07 = 358,959.37/x
  3. Step 3: Cross multiply
    645,445.45x = 890,702.07 × 358,959.37
  4. Step 4: Simplify right side
    645,445.45x = 319,725,853,904.90
  5. Step 5: Solve for x
    x = 319,725,853,904.90/645,445.45
  6. Step 6: Final answer
    x = 495,356.89

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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.