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Finding the Fourth Proportional to 871,803.84, 1,203,090.32 and 489,830.40

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Solution

The fourth proportional to 871,803.84, 1,203,090.32 and 489,830.40 is: 675,966.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,803.84 : 1,203,090.32 = 489,830.40 : x
  2. Step 2: Convert to fraction form
    871,803.84/1,203,090.32 = 489,830.40/x
  3. Step 3: Cross multiply
    871,803.84x = 1,203,090.32 × 489,830.40
  4. Step 4: Simplify right side
    871,803.84x = 589,310,212,681.73
  5. Step 5: Solve for x
    x = 589,310,212,681.73/871,803.84
  6. Step 6: Final answer
    x = 675,966.53

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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.