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Finding the Fourth Proportional to 610,128.78, 915,134.85 and 373,349.58

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Solution

The fourth proportional to 610,128.78, 915,134.85 and 373,349.58 is: 559,988.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,128.78 : 915,134.85 = 373,349.58 : x
  2. Step 2: Convert to fraction form
    610,128.78/915,134.85 = 373,349.58/x
  3. Step 3: Cross multiply
    610,128.78x = 915,134.85 × 373,349.58
  4. Step 4: Simplify right side
    610,128.78x = 341,665,211,890.86
  5. Step 5: Solve for x
    x = 341,665,211,890.86/610,128.78
  6. Step 6: Final answer
    x = 559,988.68

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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.