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Finding the Fourth Proportional to 709,237.58, 978,746.47 and 386,947.89

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Solution

The fourth proportional to 709,237.58, 978,746.47 and 386,947.89 is: 533,987.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,237.58 : 978,746.47 = 386,947.89 : x
  2. Step 2: Convert to fraction form
    709,237.58/978,746.47 = 386,947.89/x
  3. Step 3: Cross multiply
    709,237.58x = 978,746.47 × 386,947.89
  4. Step 4: Simplify right side
    709,237.58x = 378,723,880,444.08
  5. Step 5: Solve for x
    x = 378,723,880,444.08/709,237.58
  6. Step 6: Final answer
    x = 533,987.33

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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.