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Finding the Fourth Proportional to 659,406.61, 910,019.49 and 369,015.72

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Solution

The fourth proportional to 659,406.61, 910,019.49 and 369,015.72 is: 509,263.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,406.61 : 910,019.49 = 369,015.72 : x
  2. Step 2: Convert to fraction form
    659,406.61/910,019.49 = 369,015.72/x
  3. Step 3: Cross multiply
    659,406.61x = 910,019.49 × 369,015.72
  4. Step 4: Simplify right side
    659,406.61x = 335,811,497,316.38
  5. Step 5: Solve for x
    x = 335,811,497,316.38/659,406.61
  6. Step 6: Final answer
    x = 509,263.17

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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.