Home / 645,478.08-890,743.84-373,508.20

Finding the Fourth Proportional to 645,478.08, 890,743.84 and 373,508.20

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Solution

The fourth proportional to 645,478.08, 890,743.84 and 373,508.20 is: 515,432.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,478.08 : 890,743.84 = 373,508.20 : x
  2. Step 2: Convert to fraction form
    645,478.08/890,743.84 = 373,508.20/x
  3. Step 3: Cross multiply
    645,478.08x = 890,743.84 × 373,508.20
  4. Step 4: Simplify right side
    645,478.08x = 332,700,128,339.49
  5. Step 5: Solve for x
    x = 332,700,128,339.49/645,478.08
  6. Step 6: Final answer
    x = 515,432.11

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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.