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Finding the Fourth Proportional to 638,886.80, 958,330.20 and 470,925.20

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Solution

The fourth proportional to 638,886.80, 958,330.20 and 470,925.20 is: 706,387.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,886.80 : 958,330.20 = 470,925.20 : x
  2. Step 2: Convert to fraction form
    638,886.80/958,330.20 = 470,925.20/x
  3. Step 3: Cross multiply
    638,886.80x = 958,330.20 × 470,925.20
  4. Step 4: Simplify right side
    638,886.80x = 451,301,841,101.04
  5. Step 5: Solve for x
    x = 451,301,841,101.04/638,886.80
  6. Step 6: Final answer
    x = 706,387.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.