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Finding the Fourth Proportional to 648,128.15, 894,412 and 357,739.66

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Solution

The fourth proportional to 648,128.15, 894,412 and 357,739.66 is: 493,678.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,128.15 : 894,412 = 357,739.66 : x
  2. Step 2: Convert to fraction form
    648,128.15/894,412 = 357,739.66/x
  3. Step 3: Cross multiply
    648,128.15x = 894,412 × 357,739.66
  4. Step 4: Simplify right side
    648,128.15x = 319,966,644,779.92
  5. Step 5: Solve for x
    x = 319,966,644,779.92/648,128.15
  6. Step 6: Final answer
    x = 493,678.06

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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.