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Finding the Fourth Proportional to 708,699.60, 1,063,547.54 and 640,940.87

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Solution

The fourth proportional to 708,699.60, 1,063,547.54 and 640,940.87 is: 961,861.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,699.60 : 1,063,547.54 = 640,940.87 : x
  2. Step 2: Convert to fraction form
    708,699.60/1,063,547.54 = 640,940.87/x
  3. Step 3: Cross multiply
    708,699.60x = 1,063,547.54 × 640,940.87
  4. Step 4: Simplify right side
    708,699.60x = 681,671,077,051.52
  5. Step 5: Solve for x
    x = 681,671,077,051.52/708,699.60
  6. Step 6: Final answer
    x = 961,861.81

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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.