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Finding the Fourth Proportional to 710,605.30, 980,648.14 and 388,328.98

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Solution

The fourth proportional to 710,605.30, 980,648.14 and 388,328.98 is: 535,901.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,605.30 : 980,648.14 = 388,328.98 : x
  2. Step 2: Convert to fraction form
    710,605.30/980,648.14 = 388,328.98/x
  3. Step 3: Cross multiply
    710,605.30x = 980,648.14 × 388,328.98
  4. Step 4: Simplify right side
    710,605.30x = 380,814,091,945.10
  5. Step 5: Solve for x
    x = 380,814,091,945.10/710,605.30
  6. Step 6: Final answer
    x = 535,901.00

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1.5x scale

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.