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Finding the Fourth Proportional to 708,099.24, 976,730.42 and 421,405.32

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Solution

The fourth proportional to 708,099.24, 976,730.42 and 421,405.32 is: 581,273.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,099.24 : 976,730.42 = 421,405.32 : x
  2. Step 2: Convert to fraction form
    708,099.24/976,730.42 = 421,405.32/x
  3. Step 3: Cross multiply
    708,099.24x = 976,730.42 × 421,405.32
  4. Step 4: Simplify right side
    708,099.24x = 411,599,395,193.83
  5. Step 5: Solve for x
    x = 411,599,395,193.83/708,099.24
  6. Step 6: Final answer
    x = 581,273.60

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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.