Home / 1,355,841.30-1,871,937.50-840,142.45

Finding the Fourth Proportional to 1,355,841.30, 1,871,937.50 and 840,142.45

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Solution

The fourth proportional to 1,355,841.30, 1,871,937.50 and 840,142.45 is: 1,159,939.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355,841.30 : 1,871,937.50 = 840,142.45 : x
  2. Step 2: Convert to fraction form
    1,355,841.30/1,871,937.50 = 840,142.45/x
  3. Step 3: Cross multiply
    1,355,841.30x = 1,871,937.50 × 840,142.45
  4. Step 4: Simplify right side
    1,355,841.30x = 1,572,694,149,645.81
  5. Step 5: Solve for x
    x = 1,572,694,149,645.81/1,355,841.30
  6. Step 6: Final answer
    x = 1,159,939.70

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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.