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Finding the Fourth Proportional to 505,931.40, 757,537.12 and 385,414.20

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Solution

The fourth proportional to 505,931.40, 757,537.12 and 385,414.20 is: 577,085.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,931.40 : 757,537.12 = 385,414.20 : x
  2. Step 2: Convert to fraction form
    505,931.40/757,537.12 = 385,414.20/x
  3. Step 3: Cross multiply
    505,931.40x = 757,537.12 × 385,414.20
  4. Step 4: Simplify right side
    505,931.40x = 291,965,563,075.10
  5. Step 5: Solve for x
    x = 291,965,563,075.10/505,931.40
  6. Step 6: Final answer
    x = 577,085.28

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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.