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Finding the Fourth Proportional to 868,728.80, 1,302,142.80 and 307,474.40

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Solution

The fourth proportional to 868,728.80, 1,302,142.80 and 307,474.40 is: 460,875.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,728.80 : 1,302,142.80 = 307,474.40 : x
  2. Step 2: Convert to fraction form
    868,728.80/1,302,142.80 = 307,474.40/x
  3. Step 3: Cross multiply
    868,728.80x = 1,302,142.80 × 307,474.40
  4. Step 4: Simplify right side
    868,728.80x = 400,375,576,144.32
  5. Step 5: Solve for x
    x = 400,375,576,144.32/868,728.80
  6. Step 6: Final answer
    x = 460,875.22

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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.