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Finding the Fourth Proportional to 486,215.19, 728,945.15 and 315,075.38

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Solution

The fourth proportional to 486,215.19, 728,945.15 and 315,075.38 is: 472,368.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,215.19 : 728,945.15 = 315,075.38 : x
  2. Step 2: Convert to fraction form
    486,215.19/728,945.15 = 315,075.38/x
  3. Step 3: Cross multiply
    486,215.19x = 728,945.15 × 315,075.38
  4. Step 4: Simplify right side
    486,215.19x = 229,672,664,915.30
  5. Step 5: Solve for x
    x = 229,672,664,915.30/486,215.19
  6. Step 6: Final answer
    x = 472,368.35

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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.