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Finding the Fourth Proportional to 645,169, 890,333.22 and 362,545

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Solution

The fourth proportional to 645,169, 890,333.22 and 362,545 is: 500,312.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,169 : 890,333.22 = 362,545 : x
  2. Step 2: Convert to fraction form
    645,169/890,333.22 = 362,545/x
  3. Step 3: Cross multiply
    645,169x = 890,333.22 × 362,545
  4. Step 4: Simplify right side
    645,169x = 322,785,857,244.90
  5. Step 5: Solve for x
    x = 322,785,857,244.90/645,169
  6. Step 6: Final answer
    x = 500,312.10

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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.