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Finding the Fourth Proportional to 413,910.40, 620,865.60 and 346,988.20

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Solution

The fourth proportional to 413,910.40, 620,865.60 and 346,988.20 is: 520,482.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,910.40 : 620,865.60 = 346,988.20 : x
  2. Step 2: Convert to fraction form
    413,910.40/620,865.60 = 346,988.20/x
  3. Step 3: Cross multiply
    413,910.40x = 620,865.60 × 346,988.20
  4. Step 4: Simplify right side
    413,910.40x = 215,433,036,985.92
  5. Step 5: Solve for x
    x = 215,433,036,985.92/413,910.40
  6. Step 6: Final answer
    x = 520,482.30

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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.