Home / 642,409.23-963,314.69-287,426.19

Finding the Fourth Proportional to 642,409.23, 963,314.69 and 287,426.19

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Solution

The fourth proportional to 642,409.23, 963,314.69 and 287,426.19 is: 431,005.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,409.23 : 963,314.69 = 287,426.19 : x
  2. Step 2: Convert to fraction form
    642,409.23/963,314.69 = 287,426.19/x
  3. Step 3: Cross multiply
    642,409.23x = 963,314.69 × 287,426.19
  4. Step 4: Simplify right side
    642,409.23x = 276,881,869,680.60
  5. Step 5: Solve for x
    x = 276,881,869,680.60/642,409.23
  6. Step 6: Final answer
    x = 431,005.44

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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.