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Finding the Fourth Proportional to 478,521.99, 660,487.69 and 282,460.85

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Solution

The fourth proportional to 478,521.99, 660,487.69 and 282,460.85 is: 389,871.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,521.99 : 660,487.69 = 282,460.85 : x
  2. Step 2: Convert to fraction form
    478,521.99/660,487.69 = 282,460.85/x
  3. Step 3: Cross multiply
    478,521.99x = 660,487.69 × 282,460.85
  4. Step 4: Simplify right side
    478,521.99x = 186,561,918,369.07
  5. Step 5: Solve for x
    x = 186,561,918,369.07/478,521.99
  6. Step 6: Final answer
    x = 389,871.15

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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.