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Finding the Fourth Proportional to 634,478.85, 875,637 and 348,054.75

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Solution

The fourth proportional to 634,478.85, 875,637 and 348,054.75 is: 480,346.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    634,478.85 : 875,637 = 348,054.75 : x
  2. Step 2: Convert to fraction form
    634,478.85/875,637 = 348,054.75/x
  3. Step 3: Cross multiply
    634,478.85x = 875,637 × 348,054.75
  4. Step 4: Simplify right side
    634,478.85x = 304,769,617,125.75
  5. Step 5: Solve for x
    x = 304,769,617,125.75/634,478.85
  6. Step 6: Final answer
    x = 480,346.38

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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.