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Finding the Fourth Proportional to 1,431,643, 1,975,617 and 787,058.50

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Solution

The fourth proportional to 1,431,643, 1,975,617 and 787,058.50 is: 1,086,113.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431,643 : 1,975,617 = 787,058.50 : x
  2. Step 2: Convert to fraction form
    1,431,643/1,975,617 = 787,058.50/x
  3. Step 3: Cross multiply
    1,431,643x = 1,975,617 × 787,058.50
  4. Step 4: Simplify right side
    1,431,643x = 1,554,926,152,594.50
  5. Step 5: Solve for x
    x = 1,554,926,152,594.50/1,431,643
  6. Step 6: Final answer
    x = 1,086,113.06

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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.