Home / 1,225,312-1,689,157.91-811,154.80

Finding the Fourth Proportional to 1,225,312, 1,689,157.91 and 811,154.80

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Solution

The fourth proportional to 1,225,312, 1,689,157.91 and 811,154.80 is: 1,118,220.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225,312 : 1,689,157.91 = 811,154.80 : x
  2. Step 2: Convert to fraction form
    1,225,312/1,689,157.91 = 811,154.80/x
  3. Step 3: Cross multiply
    1,225,312x = 1,689,157.91 × 811,154.80
  4. Step 4: Simplify right side
    1,225,312x = 1,370,168,546,654.47
  5. Step 5: Solve for x
    x = 1,370,168,546,654.47/1,225,312
  6. Step 6: Final answer
    x = 1,118,220.13

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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.