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Finding the Fourth Proportional to 643,061.63, 887,361.08 and 371,217.10

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Solution

The fourth proportional to 643,061.63, 887,361.08 and 371,217.10 is: 512,242.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,061.63 : 887,361.08 = 371,217.10 : x
  2. Step 2: Convert to fraction form
    643,061.63/887,361.08 = 371,217.10/x
  3. Step 3: Cross multiply
    643,061.63x = 887,361.08 × 371,217.10
  4. Step 4: Simplify right side
    643,061.63x = 329,403,602,695.98
  5. Step 5: Solve for x
    x = 329,403,602,695.98/643,061.63
  6. Step 6: Final answer
    x = 512,242.67

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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.