Home / 1,388,311.02-1,915,855.86-776,456.46

Finding the Fourth Proportional to 1,388,311.02, 1,915,855.86 and 776,456.46

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Solution

The fourth proportional to 1,388,311.02, 1,915,855.86 and 776,456.46 is: 1,071,502.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,311.02 : 1,915,855.86 = 776,456.46 : x
  2. Step 2: Convert to fraction form
    1,388,311.02/1,915,855.86 = 776,456.46/x
  3. Step 3: Cross multiply
    1,388,311.02x = 1,915,855.86 × 776,456.46
  4. Step 4: Simplify right side
    1,388,311.02x = 1,487,578,658,925.86
  5. Step 5: Solve for x
    x = 1,487,578,658,925.86/1,388,311.02
  6. Step 6: Final answer
    x = 1,071,502.45

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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.