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Finding the Fourth Proportional to 615,136.80, 921,841.20 and 488,992.80

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Solution

The fourth proportional to 615,136.80, 921,841.20 and 488,992.80 is: 732,802.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,136.80 : 921,841.20 = 488,992.80 : x
  2. Step 2: Convert to fraction form
    615,136.80/921,841.20 = 488,992.80/x
  3. Step 3: Cross multiply
    615,136.80x = 921,841.20 × 488,992.80
  4. Step 4: Simplify right side
    615,136.80x = 450,773,709,543.36
  5. Step 5: Solve for x
    x = 450,773,709,543.36/615,136.80
  6. Step 6: Final answer
    x = 732,802.38

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1.5x scale

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.