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Finding the Fourth Proportional to 449,088.30, 618,689.14 and 312,875.88

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Solution

The fourth proportional to 449,088.30, 618,689.14 and 312,875.88 is: 431,035.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,088.30 : 618,689.14 = 312,875.88 : x
  2. Step 2: Convert to fraction form
    449,088.30/618,689.14 = 312,875.88/x
  3. Step 3: Cross multiply
    449,088.30x = 618,689.14 × 312,875.88
  4. Step 4: Simplify right side
    449,088.30x = 193,572,909,123.94
  5. Step 5: Solve for x
    x = 193,572,909,123.94/449,088.30
  6. Step 6: Final answer
    x = 431,035.30

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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.