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Finding the Fourth Proportional to 1,391,565.02, 1,921,529.79 and 1,046,803.30

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Solution

The fourth proportional to 1,391,565.02, 1,921,529.79 and 1,046,803.30 is: 1,445,468.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,565.02 : 1,921,529.79 = 1,046,803.30 : x
  2. Step 2: Convert to fraction form
    1,391,565.02/1,921,529.79 = 1,046,803.30/x
  3. Step 3: Cross multiply
    1,391,565.02x = 1,921,529.79 × 1,046,803.30
  4. Step 4: Simplify right side
    1,391,565.02x = 2,011,463,720,416.48
  5. Step 5: Solve for x
    x = 2,011,463,720,416.48/1,391,565.02
  6. Step 6: Final answer
    x = 1,445,468.73

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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.