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Finding the Fourth Proportional to 666,769.17, 920,147.18 and 380,303.76

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Solution

The fourth proportional to 666,769.17, 920,147.18 and 380,303.76 is: 524,822.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,769.17 : 920,147.18 = 380,303.76 : x
  2. Step 2: Convert to fraction form
    666,769.17/920,147.18 = 380,303.76/x
  3. Step 3: Cross multiply
    666,769.17x = 920,147.18 × 380,303.76
  4. Step 4: Simplify right side
    666,769.17x = 349,935,428,657.42
  5. Step 5: Solve for x
    x = 349,935,428,657.42/666,769.17
  6. Step 6: Final answer
    x = 524,822.45

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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.