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Finding the Fourth Proportional to 710,075.22, 979,898.79 and 387,785.40

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Solution

The fourth proportional to 710,075.22, 979,898.79 and 387,785.40 is: 535,141.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,075.22 : 979,898.79 = 387,785.40 : x
  2. Step 2: Convert to fraction form
    710,075.22/979,898.79 = 387,785.40/x
  3. Step 3: Cross multiply
    710,075.22x = 979,898.79 × 387,785.40
  4. Step 4: Simplify right side
    710,075.22x = 379,990,444,239.67
  5. Step 5: Solve for x
    x = 379,990,444,239.67/710,075.22
  6. Step 6: Final answer
    x = 535,141.11

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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.