Home / 645,465.85-890,774.43-358,979.79

Finding the Fourth Proportional to 645,465.85, 890,774.43 and 358,979.79

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Solution

The fourth proportional to 645,465.85, 890,774.43 and 358,979.79 is: 495,409.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,465.85 : 890,774.43 = 358,979.79 : x
  2. Step 2: Convert to fraction form
    645,465.85/890,774.43 = 358,979.79/x
  3. Step 3: Cross multiply
    645,465.85x = 890,774.43 × 358,979.79
  4. Step 4: Simplify right side
    645,465.85x = 319,770,017,818.77
  5. Step 5: Solve for x
    x = 319,770,017,818.77/645,465.85
  6. Step 6: Final answer
    x = 495,409.66

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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.