Home / 663,902.92-913,971.28-633,399.40

Finding the Fourth Proportional to 663,902.92, 913,971.28 and 633,399.40

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Solution

The fourth proportional to 663,902.92, 913,971.28 and 633,399.40 is: 871,978.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,902.92 : 913,971.28 = 633,399.40 : x
  2. Step 2: Convert to fraction form
    663,902.92/913,971.28 = 633,399.40/x
  3. Step 3: Cross multiply
    663,902.92x = 913,971.28 × 633,399.40
  4. Step 4: Simplify right side
    663,902.92x = 578,908,860,369.23
  5. Step 5: Solve for x
    x = 578,908,860,369.23/663,902.92
  6. Step 6: Final answer
    x = 871,978.18

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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.