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Finding the Fourth Proportional to 680,428.80, 1,020,643.20 and 477,475.20

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Solution

The fourth proportional to 680,428.80, 1,020,643.20 and 477,475.20 is: 716,212.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,428.80 : 1,020,643.20 = 477,475.20 : x
  2. Step 2: Convert to fraction form
    680,428.80/1,020,643.20 = 477,475.20/x
  3. Step 3: Cross multiply
    680,428.80x = 1,020,643.20 × 477,475.20
  4. Step 4: Simplify right side
    680,428.80x = 487,331,816,048.64
  5. Step 5: Solve for x
    x = 487,331,816,048.64/680,428.80
  6. Step 6: Final answer
    x = 716,212.80

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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.