Home / 645,258.88-890,463.12-358,771.60

Finding the Fourth Proportional to 645,258.88, 890,463.12 and 358,771.60

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Solution

The fourth proportional to 645,258.88, 890,463.12 and 358,771.60 is: 495,108.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,258.88 : 890,463.12 = 358,771.60 : x
  2. Step 2: Convert to fraction form
    645,258.88/890,463.12 = 358,771.60/x
  3. Step 3: Cross multiply
    645,258.88x = 890,463.12 × 358,771.60
  4. Step 4: Simplify right side
    645,258.88x = 319,472,878,303.39
  5. Step 5: Solve for x
    x = 319,472,878,303.39/645,258.88
  6. Step 6: Final answer
    x = 495,108.07

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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.