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Finding the Fourth Proportional to 535,425.19, 738,886.76 and 309,070.69

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Solution

The fourth proportional to 535,425.19, 738,886.76 and 309,070.69 is: 426,517.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    535,425.19 : 738,886.76 = 309,070.69 : x
  2. Step 2: Convert to fraction form
    535,425.19/738,886.76 = 309,070.69/x
  3. Step 3: Cross multiply
    535,425.19x = 738,886.76 × 309,070.69
  4. Step 4: Simplify right side
    535,425.19x = 228,368,238,511.51
  5. Step 5: Solve for x
    x = 228,368,238,511.51/535,425.19
  6. Step 6: Final answer
    x = 426,517.55

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1.5x scale

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.