Home / 645,485.40-890,707.50-373,499.15

Finding the Fourth Proportional to 645,485.40, 890,707.50 and 373,499.15

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Solution

The fourth proportional to 645,485.40, 890,707.50 and 373,499.15 is: 515,392.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,485.40 : 890,707.50 = 373,499.15 : x
  2. Step 2: Convert to fraction form
    645,485.40/890,707.50 = 373,499.15/x
  3. Step 3: Cross multiply
    645,485.40x = 890,707.50 × 373,499.15
  4. Step 4: Simplify right side
    645,485.40x = 332,678,489,695.09
  5. Step 5: Solve for x
    x = 332,678,489,695.09/645,485.40
  6. Step 6: Final answer
    x = 515,392.74

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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.