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Finding the Fourth Proportional to 659,406.80, 990,276.60 and 510,010.40

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Solution

The fourth proportional to 659,406.80, 990,276.60 and 510,010.40 is: 765,917.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,406.80 : 990,276.60 = 510,010.40 : x
  2. Step 2: Convert to fraction form
    659,406.80/990,276.60 = 510,010.40/x
  3. Step 3: Cross multiply
    659,406.80x = 990,276.60 × 510,010.40
  4. Step 4: Simplify right side
    659,406.80x = 505,051,364,876.64
  5. Step 5: Solve for x
    x = 505,051,364,876.64/659,406.80
  6. Step 6: Final answer
    x = 765,917.74

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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.