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Finding the Fourth Proportional to 777,475.75, 1,072,549.70 and 454,986.20

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Solution

The fourth proportional to 777,475.75, 1,072,549.70 and 454,986.20 is: 627,666.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,475.75 : 1,072,549.70 = 454,986.20 : x
  2. Step 2: Convert to fraction form
    777,475.75/1,072,549.70 = 454,986.20/x
  3. Step 3: Cross multiply
    777,475.75x = 1,072,549.70 × 454,986.20
  4. Step 4: Simplify right side
    777,475.75x = 487,995,312,314.14
  5. Step 5: Solve for x
    x = 487,995,312,314.14/777,475.75
  6. Step 6: Final answer
    x = 627,666.28

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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.