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Finding the Fourth Proportional to 526,639.60, 789,959.40 and 421,663.60

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Solution

The fourth proportional to 526,639.60, 789,959.40 and 421,663.60 is: 632,495.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,639.60 : 789,959.40 = 421,663.60 : x
  2. Step 2: Convert to fraction form
    526,639.60/789,959.40 = 421,663.60/x
  3. Step 3: Cross multiply
    526,639.60x = 789,959.40 × 421,663.60
  4. Step 4: Simplify right side
    526,639.60x = 333,097,124,457.84
  5. Step 5: Solve for x
    x = 333,097,124,457.84/526,639.60
  6. Step 6: Final answer
    x = 632,495.40

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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.