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Finding the Fourth Proportional to 390,033.74, 537,726.12 and 309,727.10

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Solution

The fourth proportional to 390,033.74, 537,726.12 and 309,727.10 is: 427,010.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,033.74 : 537,726.12 = 309,727.10 : x
  2. Step 2: Convert to fraction form
    390,033.74/537,726.12 = 309,727.10/x
  3. Step 3: Cross multiply
    390,033.74x = 537,726.12 × 309,727.10
  4. Step 4: Simplify right side
    390,033.74x = 166,548,351,741.85
  5. Step 5: Solve for x
    x = 166,548,351,741.85/390,033.74
  6. Step 6: Final answer
    x = 427,010.11

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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.