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Finding the Fourth Proportional to 642,921.18, 963,448.65 and 361,838.22

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Solution

The fourth proportional to 642,921.18, 963,448.65 and 361,838.22 is: 542,232.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,921.18 : 963,448.65 = 361,838.22 : x
  2. Step 2: Convert to fraction form
    642,921.18/963,448.65 = 361,838.22/x
  3. Step 3: Cross multiply
    642,921.18x = 963,448.65 × 361,838.22
  4. Step 4: Simplify right side
    642,921.18x = 348,612,544,577.40
  5. Step 5: Solve for x
    x = 348,612,544,577.40/642,921.18
  6. Step 6: Final answer
    x = 542,232.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.