Home / 1,355,276.48-1,869,967.89-811,205.55

Finding the Fourth Proportional to 1,355,276.48, 1,869,967.89 and 811,205.55

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Solution

The fourth proportional to 1,355,276.48, 1,869,967.89 and 811,205.55 is: 1,119,275.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355,276.48 : 1,869,967.89 = 811,205.55 : x
  2. Step 2: Convert to fraction form
    1,355,276.48/1,869,967.89 = 811,205.55/x
  3. Step 3: Cross multiply
    1,355,276.48x = 1,869,967.89 × 811,205.55
  4. Step 4: Simplify right side
    1,355,276.48x = 1,516,928,330,689.79
  5. Step 5: Solve for x
    x = 1,516,928,330,689.79/1,355,276.48
  6. Step 6: Final answer
    x = 1,119,275.93

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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.