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Finding the Fourth Proportional to 315,646.55, 435,479.06 and 186,557.93

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Solution

The fourth proportional to 315,646.55, 435,479.06 and 186,557.93 is: 257,383.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,646.55 : 435,479.06 = 186,557.93 : x
  2. Step 2: Convert to fraction form
    315,646.55/435,479.06 = 186,557.93/x
  3. Step 3: Cross multiply
    315,646.55x = 435,479.06 × 186,557.93
  4. Step 4: Simplify right side
    315,646.55x = 81,242,071,059.16
  5. Step 5: Solve for x
    x = 81,242,071,059.16/315,646.55
  6. Step 6: Final answer
    x = 257,383.05

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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.