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Finding the Fourth Proportional to 306,709.60, 423,248.88 and 172,547.68

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Solution

The fourth proportional to 306,709.60, 423,248.88 and 172,547.68 is: 238,109.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,709.60 : 423,248.88 = 172,547.68 : x
  2. Step 2: Convert to fraction form
    306,709.60/423,248.88 = 172,547.68/x
  3. Step 3: Cross multiply
    306,709.60x = 423,248.88 × 172,547.68
  4. Step 4: Simplify right side
    306,709.60x = 73,030,612,306.60
  5. Step 5: Solve for x
    x = 73,030,612,306.60/306,709.60
  6. Step 6: Final answer
    x = 238,109.97

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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.