Home / 871,811.40-1,307,717.10-310,643.40

Finding the Fourth Proportional to 871,811.40, 1,307,717.10 and 310,643.40

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Solution

The fourth proportional to 871,811.40, 1,307,717.10 and 310,643.40 is: 465,965.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,811.40 : 1,307,717.10 = 310,643.40 : x
  2. Step 2: Convert to fraction form
    871,811.40/1,307,717.10 = 310,643.40/x
  3. Step 3: Cross multiply
    871,811.40x = 1,307,717.10 × 310,643.40
  4. Step 4: Simplify right side
    871,811.40x = 406,233,686,182.14
  5. Step 5: Solve for x
    x = 406,233,686,182.14/871,811.40
  6. Step 6: Final answer
    x = 465,965.10

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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.