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Finding the Fourth Proportional to 666,886.91, 920,311.27 and 380,423.93

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Solution

The fourth proportional to 666,886.91, 920,311.27 and 380,423.93 is: 524,989.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,886.91 : 920,311.27 = 380,423.93 : x
  2. Step 2: Convert to fraction form
    666,886.91/920,311.27 = 380,423.93/x
  3. Step 3: Cross multiply
    666,886.91x = 920,311.27 × 380,423.93
  4. Step 4: Simplify right side
    666,886.91x = 350,108,424,604.08
  5. Step 5: Solve for x
    x = 350,108,424,604.08/666,886.91
  6. Step 6: Final answer
    x = 524,989.20

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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.