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Finding the Fourth Proportional to 628,938.80, 942,025.80 and 615,114.80

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Solution

The fourth proportional to 628,938.80, 942,025.80 and 615,114.80 is: 921,320.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,938.80 : 942,025.80 = 615,114.80 : x
  2. Step 2: Convert to fraction form
    628,938.80/942,025.80 = 615,114.80/x
  3. Step 3: Cross multiply
    628,938.80x = 942,025.80 × 615,114.80
  4. Step 4: Simplify right side
    628,938.80x = 579,454,011,561.84
  5. Step 5: Solve for x
    x = 579,454,011,561.84/628,938.80
  6. Step 6: Final answer
    x = 921,320.18

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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.