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Finding the Fourth Proportional to 689,205, 951,127.80 and 383,312.76

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Solution

The fourth proportional to 689,205, 951,127.80 and 383,312.76 is: 528,985.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,205 : 951,127.80 = 383,312.76 : x
  2. Step 2: Convert to fraction form
    689,205/951,127.80 = 383,312.76/x
  3. Step 3: Cross multiply
    689,205x = 951,127.80 × 383,312.76
  4. Step 4: Simplify right side
    689,205x = 364,579,422,130.73
  5. Step 5: Solve for x
    x = 364,579,422,130.73/689,205
  6. Step 6: Final answer
    x = 528,985.46

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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.