Home / 645,079.11-890,232.02-354,712.79

Finding the Fourth Proportional to 645,079.11, 890,232.02 and 354,712.79

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Solution

The fourth proportional to 645,079.11, 890,232.02 and 354,712.79 is: 489,516.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,079.11 : 890,232.02 = 354,712.79 : x
  2. Step 2: Convert to fraction form
    645,079.11/890,232.02 = 354,712.79/x
  3. Step 3: Cross multiply
    645,079.11x = 890,232.02 × 354,712.79
  4. Step 4: Simplify right side
    645,079.11x = 315,776,677,336.81
  5. Step 5: Solve for x
    x = 315,776,677,336.81/645,079.11
  6. Step 6: Final answer
    x = 489,516.20

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Double scale
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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.