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Finding the Fourth Proportional to 390,909.84, 539,362.52 and 237,946.36

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Solution

The fourth proportional to 390,909.84, 539,362.52 and 237,946.36 is: 328,309.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,909.84 : 539,362.52 = 237,946.36 : x
  2. Step 2: Convert to fraction form
    390,909.84/539,362.52 = 237,946.36/x
  3. Step 3: Cross multiply
    390,909.84x = 539,362.52 × 237,946.36
  4. Step 4: Simplify right side
    390,909.84x = 128,339,348,354.43
  5. Step 5: Solve for x
    x = 128,339,348,354.43/390,909.84
  6. Step 6: Final answer
    x = 328,309.33

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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.