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Finding the Fourth Proportional to 803,480.90, 1,205,559.39 and 500,128.74

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Solution

The fourth proportional to 803,480.90, 1,205,559.39 and 500,128.74 is: 750,403.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    803,480.90 : 1,205,559.39 = 500,128.74 : x
  2. Step 2: Convert to fraction form
    803,480.90/1,205,559.39 = 500,128.74/x
  3. Step 3: Cross multiply
    803,480.90x = 1,205,559.39 × 500,128.74
  4. Step 4: Simplify right side
    803,480.90x = 602,934,898,715.87
  5. Step 5: Solve for x
    x = 602,934,898,715.87/803,480.90
  6. Step 6: Final answer
    x = 750,403.53

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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.