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Finding the Fourth Proportional to 634,638.78, 875,801.61 and 348,158.79

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Solution

The fourth proportional to 634,638.78, 875,801.61 and 348,158.79 is: 480,459.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    634,638.78 : 875,801.61 = 348,158.79 : x
  2. Step 2: Convert to fraction form
    634,638.78/875,801.61 = 348,158.79/x
  3. Step 3: Cross multiply
    634,638.78x = 875,801.61 × 348,158.79
  4. Step 4: Simplify right side
    634,638.78x = 304,918,028,817.65
  5. Step 5: Solve for x
    x = 304,918,028,817.65/634,638.78
  6. Step 6: Final answer
    x = 480,459.18

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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.