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Finding the Fourth Proportional to 403,652.68, 553,006.93 and 388,518.76

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Solution

The fourth proportional to 403,652.68, 553,006.93 and 388,518.76 is: 532,273.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,652.68 : 553,006.93 = 388,518.76 : x
  2. Step 2: Convert to fraction form
    403,652.68/553,006.93 = 388,518.76/x
  3. Step 3: Cross multiply
    403,652.68x = 553,006.93 × 388,518.76
  4. Step 4: Simplify right side
    403,652.68x = 214,853,566,715.01
  5. Step 5: Solve for x
    x = 214,853,566,715.01/403,652.68
  6. Step 6: Final answer
    x = 532,273.36

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.