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Finding the Fourth Proportional to 676,866.90, 933,957.90 and 386,345.82

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Solution

The fourth proportional to 676,866.90, 933,957.90 and 386,345.82 is: 533,089.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,866.90 : 933,957.90 = 386,345.82 : x
  2. Step 2: Convert to fraction form
    676,866.90/933,957.90 = 386,345.82/x
  3. Step 3: Cross multiply
    676,866.90x = 933,957.90 × 386,345.82
  4. Step 4: Simplify right side
    676,866.90x = 360,830,730,720.98
  5. Step 5: Solve for x
    x = 360,830,730,720.98/676,866.90
  6. Step 6: Final answer
    x = 533,089.64

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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.