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Finding the Fourth Proportional to 666,901.08, 920,411.10 and 380,355.48

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Solution

The fourth proportional to 666,901.08, 920,411.10 and 380,355.48 is: 524,940.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,901.08 : 920,411.10 = 380,355.48 : x
  2. Step 2: Convert to fraction form
    666,901.08/920,411.10 = 380,355.48/x
  3. Step 3: Cross multiply
    666,901.08x = 920,411.10 × 380,355.48
  4. Step 4: Simplify right side
    666,901.08x = 350,083,405,737.83
  5. Step 5: Solve for x
    x = 350,083,405,737.83/666,901.08
  6. Step 6: Final answer
    x = 524,940.53

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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.