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Finding the Fourth Proportional to 631,248.40, 946,411.80 and 257,078.80

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Solution

The fourth proportional to 631,248.40, 946,411.80 and 257,078.80 is: 385,430.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,248.40 : 946,411.80 = 257,078.80 : x
  2. Step 2: Convert to fraction form
    631,248.40/946,411.80 = 257,078.80/x
  3. Step 3: Cross multiply
    631,248.40x = 946,411.80 × 257,078.80
  4. Step 4: Simplify right side
    631,248.40x = 243,302,409,849.84
  5. Step 5: Solve for x
    x = 243,302,409,849.84/631,248.40
  6. Step 6: Final answer
    x = 385,430.54

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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.