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Finding the Fourth Proportional to 666,904.83, 920,416.28 and 380,359.23

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Solution

The fourth proportional to 666,904.83, 920,416.28 and 380,359.23 is: 524,945.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,904.83 : 920,416.28 = 380,359.23 : x
  2. Step 2: Convert to fraction form
    666,904.83/920,416.28 = 380,359.23/x
  3. Step 3: Cross multiply
    666,904.83x = 920,416.28 × 380,359.23
  4. Step 4: Simplify right side
    666,904.83x = 350,088,825,638.47
  5. Step 5: Solve for x
    x = 350,088,825,638.47/666,904.83
  6. Step 6: Final answer
    x = 524,945.70

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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.