Home / 402,827.20-555,908-221,547.20

Finding the Fourth Proportional to 402,827.20, 555,908 and 221,547.20

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Solution

The fourth proportional to 402,827.20, 555,908 and 221,547.20 is: 305,738.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,827.20 : 555,908 = 221,547.20 : x
  2. Step 2: Convert to fraction form
    402,827.20/555,908 = 221,547.20/x
  3. Step 3: Cross multiply
    402,827.20x = 555,908 × 221,547.20
  4. Step 4: Simplify right side
    402,827.20x = 123,159,860,857.60
  5. Step 5: Solve for x
    x = 123,159,860,857.60/402,827.20
  6. Step 6: Final answer
    x = 305,738.69

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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.