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Finding the Fourth Proportional to 666,784.08, 920,152.62 and 380,309.04

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Solution

The fourth proportional to 666,784.08, 920,152.62 and 380,309.04 is: 524,821.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,784.08 : 920,152.62 = 380,309.04 : x
  2. Step 2: Convert to fraction form
    666,784.08/920,152.62 = 380,309.04/x
  3. Step 3: Cross multiply
    666,784.08x = 920,152.62 × 380,309.04
  4. Step 4: Simplify right side
    666,784.08x = 349,942,359,565.69
  5. Step 5: Solve for x
    x = 349,942,359,565.69/666,784.08
  6. Step 6: Final answer
    x = 524,821.11

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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.