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Finding the Fourth Proportional to 689,281.25, 951,067.51 and 402,745.91

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Solution

The fourth proportional to 689,281.25, 951,067.51 and 402,745.91 is: 555,707.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,281.25 : 951,067.51 = 402,745.91 : x
  2. Step 2: Convert to fraction form
    689,281.25/951,067.51 = 402,745.91/x
  3. Step 3: Cross multiply
    689,281.25x = 951,067.51 × 402,745.91
  4. Step 4: Simplify right side
    689,281.25x = 383,038,544,024.18
  5. Step 5: Solve for x
    x = 383,038,544,024.18/689,281.25
  6. Step 6: Final answer
    x = 555,707.19

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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.