Home / 645,337.94-890,587.86-354,961.76

Finding the Fourth Proportional to 645,337.94, 890,587.86 and 354,961.76

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Solution

The fourth proportional to 645,337.94, 890,587.86 and 354,961.76 is: 489,859.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,337.94 : 890,587.86 = 354,961.76 : x
  2. Step 2: Convert to fraction form
    645,337.94/890,587.86 = 354,961.76/x
  3. Step 3: Cross multiply
    645,337.94x = 890,587.86 × 354,961.76
  4. Step 4: Simplify right side
    645,337.94x = 316,124,634,220.23
  5. Step 5: Solve for x
    x = 316,124,634,220.23/645,337.94
  6. Step 6: Final answer
    x = 489,859.06

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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.