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Finding the Fourth Proportional to 721,376.50, 995,545.65 and 403,424.50

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Solution

The fourth proportional to 721,376.50, 995,545.65 and 403,424.50 is: 556,751.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,376.50 : 995,545.65 = 403,424.50 : x
  2. Step 2: Convert to fraction form
    721,376.50/995,545.65 = 403,424.50/x
  3. Step 3: Cross multiply
    721,376.50x = 995,545.65 × 403,424.50
  4. Step 4: Simplify right side
    721,376.50x = 401,627,506,078.43
  5. Step 5: Solve for x
    x = 401,627,506,078.43/721,376.50
  6. Step 6: Final answer
    x = 556,751.58

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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.