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Finding the Fourth Proportional to 710,068.59, 979,889.67 and 387,778.77

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Solution

The fourth proportional to 710,068.59, 979,889.67 and 387,778.77 is: 535,131.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,068.59 : 979,889.67 = 387,778.77 : x
  2. Step 2: Convert to fraction form
    710,068.59/979,889.67 = 387,778.77/x
  3. Step 3: Cross multiply
    710,068.59x = 979,889.67 × 387,778.77
  4. Step 4: Simplify right side
    710,068.59x = 379,980,410,968.31
  5. Step 5: Solve for x
    x = 379,980,410,968.31/710,068.59
  6. Step 6: Final answer
    x = 535,131.98

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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.