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Finding the Fourth Proportional to 525,139.60, 788,659.80 and 459,821.20

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Solution

The fourth proportional to 525,139.60, 788,659.80 and 459,821.20 is: 690,563.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,139.60 : 788,659.80 = 459,821.20 : x
  2. Step 2: Convert to fraction form
    525,139.60/788,659.80 = 459,821.20/x
  3. Step 3: Cross multiply
    525,139.60x = 788,659.80 × 459,821.20
  4. Step 4: Simplify right side
    525,139.60x = 362,642,495,627.76
  5. Step 5: Solve for x
    x = 362,642,495,627.76/525,139.60
  6. Step 6: Final answer
    x = 690,563.99

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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.