Home / 645,225.06-890,405.92-358,742.64

Finding the Fourth Proportional to 645,225.06, 890,405.92 and 358,742.64

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Solution

The fourth proportional to 645,225.06, 890,405.92 and 358,742.64 is: 495,062.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,225.06 : 890,405.92 = 358,742.64 : x
  2. Step 2: Convert to fraction form
    645,225.06/890,405.92 = 358,742.64/x
  3. Step 3: Cross multiply
    645,225.06x = 890,405.92 × 358,742.64
  4. Step 4: Simplify right side
    645,225.06x = 319,426,570,412.43
  5. Step 5: Solve for x
    x = 319,426,570,412.43/645,225.06
  6. Step 6: Final answer
    x = 495,062.25

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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.