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Finding the Fourth Proportional to 343,482.20, 515,223.30 and 305,428.40

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Solution

The fourth proportional to 343,482.20, 515,223.30 and 305,428.40 is: 458,142.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,482.20 : 515,223.30 = 305,428.40 : x
  2. Step 2: Convert to fraction form
    343,482.20/515,223.30 = 305,428.40/x
  3. Step 3: Cross multiply
    343,482.20x = 515,223.30 × 305,428.40
  4. Step 4: Simplify right side
    343,482.20x = 157,363,828,161.72
  5. Step 5: Solve for x
    x = 157,363,828,161.72/343,482.20
  6. Step 6: Final answer
    x = 458,142.60

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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.