Home / 2,871,128.40-4,307,275.80-978,061.20

Finding the Fourth Proportional to 2,871,128.40, 4,307,275.80 and 978,061.20

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Solution

The fourth proportional to 2,871,128.40, 4,307,275.80 and 978,061.20 is: 1,467,290.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,871,128.40 : 4,307,275.80 = 978,061.20 : x
  2. Step 2: Convert to fraction form
    2,871,128.40/4,307,275.80 = 978,061.20/x
  3. Step 3: Cross multiply
    2,871,128.40x = 4,307,275.80 × 978,061.20
  4. Step 4: Simplify right side
    2,871,128.40x = 4,212,779,337,678.96
  5. Step 5: Solve for x
    x = 4,212,779,337,678.96/2,871,128.40
  6. Step 6: Final answer
    x = 1,467,290.47

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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.