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Finding the Fourth Proportional to 638,303.77, 880,848.70 and 351,850.51

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Solution

The fourth proportional to 638,303.77, 880,848.70 and 351,850.51 is: 485,547.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,303.77 : 880,848.70 = 351,850.51 : x
  2. Step 2: Convert to fraction form
    638,303.77/880,848.70 = 351,850.51/x
  3. Step 3: Cross multiply
    638,303.77x = 880,848.70 × 351,850.51
  4. Step 4: Simplify right side
    638,303.77x = 309,927,064,327.84
  5. Step 5: Solve for x
    x = 309,927,064,327.84/638,303.77
  6. Step 6: Final answer
    x = 485,547.91

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Double scale
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Similar ratio
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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.