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Finding the Fourth Proportional to 321,875.40, 482,813.10 and 238,931.40

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Solution

The fourth proportional to 321,875.40, 482,813.10 and 238,931.40 is: 358,397.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,875.40 : 482,813.10 = 238,931.40 : x
  2. Step 2: Convert to fraction form
    321,875.40/482,813.10 = 238,931.40/x
  3. Step 3: Cross multiply
    321,875.40x = 482,813.10 × 238,931.40
  4. Step 4: Simplify right side
    321,875.40x = 115,359,209,921.34
  5. Step 5: Solve for x
    x = 115,359,209,921.34/321,875.40
  6. Step 6: Final answer
    x = 358,397.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.