Home / 645,081.44-890,235.23-354,715.10

Finding the Fourth Proportional to 645,081.44, 890,235.23 and 354,715.10

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Solution

The fourth proportional to 645,081.44, 890,235.23 and 354,715.10 is: 489,519.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,081.44 : 890,235.23 = 354,715.10 : x
  2. Step 2: Convert to fraction form
    645,081.44/890,235.23 = 354,715.10/x
  3. Step 3: Cross multiply
    645,081.44x = 890,235.23 × 354,715.10
  4. Step 4: Simplify right side
    645,081.44x = 315,779,875,746.60
  5. Step 5: Solve for x
    x = 315,779,875,746.60/645,081.44
  6. Step 6: Final answer
    x = 489,519.40

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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.