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Finding the Fourth Proportional to 499,024.56, 688,458.60 and 307,705.80

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Solution

The fourth proportional to 499,024.56, 688,458.60 and 307,705.80 is: 424,513.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,024.56 : 688,458.60 = 307,705.80 : x
  2. Step 2: Convert to fraction form
    499,024.56/688,458.60 = 307,705.80/x
  3. Step 3: Cross multiply
    499,024.56x = 688,458.60 × 307,705.80
  4. Step 4: Simplify right side
    499,024.56x = 211,842,704,279.88
  5. Step 5: Solve for x
    x = 211,842,704,279.88/499,024.56
  6. Step 6: Final answer
    x = 424,513.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.