Home / 916,778.04-1,265,129.40-508,878.72

Finding the Fourth Proportional to 916,778.04, 1,265,129.40 and 508,878.72

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Solution

The fourth proportional to 916,778.04, 1,265,129.40 and 508,878.72 is: 702,239.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,778.04 : 1,265,129.40 = 508,878.72 : x
  2. Step 2: Convert to fraction form
    916,778.04/1,265,129.40 = 508,878.72/x
  3. Step 3: Cross multiply
    916,778.04x = 1,265,129.40 × 508,878.72
  4. Step 4: Simplify right side
    916,778.04x = 643,797,429,706.37
  5. Step 5: Solve for x
    x = 643,797,429,706.37/916,778.04
  6. Step 6: Final answer
    x = 702,239.15

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1.5x scale

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.