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Finding the Fourth Proportional to 659,507.40, 989,417.07 and 525,079.80

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Solution

The fourth proportional to 659,507.40, 989,417.07 and 525,079.80 is: 787,743.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,507.40 : 989,417.07 = 525,079.80 : x
  2. Step 2: Convert to fraction form
    659,507.40/989,417.07 = 525,079.80/x
  3. Step 3: Cross multiply
    659,507.40x = 989,417.07 × 525,079.80
  4. Step 4: Simplify right side
    659,507.40x = 519,522,917,232.19
  5. Step 5: Solve for x
    x = 519,522,917,232.19/659,507.40
  6. Step 6: Final answer
    x = 787,743.88

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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.