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Finding the Fourth Proportional to 710,055.87, 979,884.89 and 387,775.45

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Solution

The fourth proportional to 710,055.87, 979,884.89 and 387,775.45 is: 535,134.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,055.87 : 979,884.89 = 387,775.45 : x
  2. Step 2: Convert to fraction form
    710,055.87/979,884.89 = 387,775.45/x
  3. Step 3: Cross multiply
    710,055.87x = 979,884.89 × 387,775.45
  4. Step 4: Simplify right side
    710,055.87x = 379,975,307,089.32
  5. Step 5: Solve for x
    x = 379,975,307,089.32/710,055.87
  6. Step 6: Final answer
    x = 535,134.38

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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.