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Finding the Fourth Proportional to 478,497.51, 660,421.89 and 274,686.12

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Solution

The fourth proportional to 478,497.51, 660,421.89 and 274,686.12 is: 379,121.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,497.51 : 660,421.89 = 274,686.12 : x
  2. Step 2: Convert to fraction form
    478,497.51/660,421.89 = 274,686.12/x
  3. Step 3: Cross multiply
    478,497.51x = 660,421.89 × 274,686.12
  4. Step 4: Simplify right side
    478,497.51x = 181,408,726,527.17
  5. Step 5: Solve for x
    x = 181,408,726,527.17/478,497.51
  6. Step 6: Final answer
    x = 379,121.57

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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.