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Finding the Fourth Proportional to 486,290.12, 671,435.84 and 314,309.84

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Solution

The fourth proportional to 486,290.12, 671,435.84 and 314,309.84 is: 433,977.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,290.12 : 671,435.84 = 314,309.84 : x
  2. Step 2: Convert to fraction form
    486,290.12/671,435.84 = 314,309.84/x
  3. Step 3: Cross multiply
    486,290.12x = 671,435.84 × 314,309.84
  4. Step 4: Simplify right side
    486,290.12x = 211,038,891,440.67
  5. Step 5: Solve for x
    x = 211,038,891,440.67/486,290.12
  6. Step 6: Final answer
    x = 433,977.34

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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.