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Finding the Fourth Proportional to 710,845.99, 980,967.40 and 388,557.37

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Solution

The fourth proportional to 710,845.99, 980,967.40 and 388,557.37 is: 536,209.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,845.99 : 980,967.40 = 388,557.37 : x
  2. Step 2: Convert to fraction form
    710,845.99/980,967.40 = 388,557.37/x
  3. Step 3: Cross multiply
    710,845.99x = 980,967.40 × 388,557.37
  4. Step 4: Simplify right side
    710,845.99x = 381,162,110,547.32
  5. Step 5: Solve for x
    x = 381,162,110,547.32/710,845.99
  6. Step 6: Final answer
    x = 536,209.13

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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.