Home / 402,721.42-555,755.98-221,436.40

Finding the Fourth Proportional to 402,721.42, 555,755.98 and 221,436.40

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Solution

The fourth proportional to 402,721.42, 555,755.98 and 221,436.40 is: 305,582.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,721.42 : 555,755.98 = 221,436.40 : x
  2. Step 2: Convert to fraction form
    402,721.42/555,755.98 = 221,436.40/x
  3. Step 3: Cross multiply
    402,721.42x = 555,755.98 × 221,436.40
  4. Step 4: Simplify right side
    402,721.42x = 123,064,603,489.67
  5. Step 5: Solve for x
    x = 123,064,603,489.67/402,721.42
  6. Step 6: Final answer
    x = 305,582.46

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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.