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Finding the Fourth Proportional to 710,779.86, 980,871.12 and 388,484.10

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Solution

The fourth proportional to 710,779.86, 980,871.12 and 388,484.10 is: 536,105.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,779.86 : 980,871.12 = 388,484.10 : x
  2. Step 2: Convert to fraction form
    710,779.86/980,871.12 = 388,484.10/x
  3. Step 3: Cross multiply
    710,779.86x = 980,871.12 × 388,484.10
  4. Step 4: Simplify right side
    710,779.86x = 381,052,834,269.19
  5. Step 5: Solve for x
    x = 381,052,834,269.19/710,779.86
  6. Step 6: Final answer
    x = 536,105.28

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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.