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Finding the Fourth Proportional to 709,762.15, 979,486.59 and 387,485.83

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Solution

The fourth proportional to 709,762.15, 979,486.59 and 387,485.83 is: 534,738.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,762.15 : 979,486.59 = 387,485.83 : x
  2. Step 2: Convert to fraction form
    709,762.15/979,486.59 = 387,485.83/x
  3. Step 3: Cross multiply
    709,762.15x = 979,486.59 × 387,485.83
  4. Step 4: Simplify right side
    709,762.15x = 379,537,174,300.02
  5. Step 5: Solve for x
    x = 379,537,174,300.02/709,762.15
  6. Step 6: Final answer
    x = 534,738.54

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Double scale
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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.