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Finding the Fourth Proportional to 417,999.60, 626,999.40 and 415,666.80

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Solution

The fourth proportional to 417,999.60, 626,999.40 and 415,666.80 is: 623,500.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,999.60 : 626,999.40 = 415,666.80 : x
  2. Step 2: Convert to fraction form
    417,999.60/626,999.40 = 415,666.80/x
  3. Step 3: Cross multiply
    417,999.60x = 626,999.40 × 415,666.80
  4. Step 4: Simplify right side
    417,999.60x = 260,622,834,199.92
  5. Step 5: Solve for x
    x = 260,622,834,199.92/417,999.60
  6. Step 6: Final answer
    x = 623,500.20

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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.