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Finding the Fourth Proportional to 402,710.28, 555,746.58 and 221,430.12

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Solution

The fourth proportional to 402,710.28, 555,746.58 and 221,430.12 is: 305,577.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,710.28 : 555,746.58 = 221,430.12 : x
  2. Step 2: Convert to fraction form
    402,710.28/555,746.58 = 221,430.12/x
  3. Step 3: Cross multiply
    402,710.28x = 555,746.58 × 221,430.12
  4. Step 4: Simplify right side
    402,710.28x = 123,059,031,898.99
  5. Step 5: Solve for x
    x = 123,059,031,898.99/402,710.28
  6. Step 6: Final answer
    x = 305,577.08

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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.