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Finding the Fourth Proportional to 676,805.48, 934,089.54 and 390,268.52

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Solution

The fourth proportional to 676,805.48, 934,089.54 and 390,268.52 is: 538,627.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,805.48 : 934,089.54 = 390,268.52 : x
  2. Step 2: Convert to fraction form
    676,805.48/934,089.54 = 390,268.52/x
  3. Step 3: Cross multiply
    676,805.48x = 934,089.54 × 390,268.52
  4. Step 4: Simplify right side
    676,805.48x = 364,545,742,323.28
  5. Step 5: Solve for x
    x = 364,545,742,323.28/676,805.48
  6. Step 6: Final answer
    x = 538,627.05

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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.