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Finding the Fourth Proportional to 857,699.28, 1,183,625.66 and 475,728.80

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Solution

The fourth proportional to 857,699.28, 1,183,625.66 and 475,728.80 is: 656,506.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,699.28 : 1,183,625.66 = 475,728.80 : x
  2. Step 2: Convert to fraction form
    857,699.28/1,183,625.66 = 475,728.80/x
  3. Step 3: Cross multiply
    857,699.28x = 1,183,625.66 × 475,728.80
  4. Step 4: Simplify right side
    857,699.28x = 563,084,810,152.20
  5. Step 5: Solve for x
    x = 563,084,810,152.20/857,699.28
  6. Step 6: Final answer
    x = 656,506.10

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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.