Home / 645,960.32-890,501.40-454,379.12

Finding the Fourth Proportional to 645,960.32, 890,501.40 and 454,379.12

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Solution

The fourth proportional to 645,960.32, 890,501.40 and 454,379.12 is: 626,393.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,960.32 : 890,501.40 = 454,379.12 : x
  2. Step 2: Convert to fraction form
    645,960.32/890,501.40 = 454,379.12/x
  3. Step 3: Cross multiply
    645,960.32x = 890,501.40 × 454,379.12
  4. Step 4: Simplify right side
    645,960.32x = 404,625,242,490.77
  5. Step 5: Solve for x
    x = 404,625,242,490.77/645,960.32
  6. Step 6: Final answer
    x = 626,393.34

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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.