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Finding the Fourth Proportional to 486,746.64, 671,643.96 and 271,859.28

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Solution

The fourth proportional to 486,746.64, 671,643.96 and 271,859.28 is: 375,128.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,746.64 : 671,643.96 = 271,859.28 : x
  2. Step 2: Convert to fraction form
    486,746.64/671,643.96 = 271,859.28/x
  3. Step 3: Cross multiply
    486,746.64x = 671,643.96 × 271,859.28
  4. Step 4: Simplify right side
    486,746.64x = 182,592,643,381.95
  5. Step 5: Solve for x
    x = 182,592,643,381.95/486,746.64
  6. Step 6: Final answer
    x = 375,128.72

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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.