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Finding the Fourth Proportional to 676,506.54, 933,565.29 and 390,009.54

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Solution

The fourth proportional to 676,506.54, 933,565.29 and 390,009.54 is: 538,205.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,506.54 : 933,565.29 = 390,009.54 : x
  2. Step 2: Convert to fraction form
    676,506.54/933,565.29 = 390,009.54/x
  3. Step 3: Cross multiply
    676,506.54x = 933,565.29 × 390,009.54
  4. Step 4: Simplify right side
    676,506.54x = 364,099,369,312.87
  5. Step 5: Solve for x
    x = 364,099,369,312.87/676,506.54
  6. Step 6: Final answer
    x = 538,205.25

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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.