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Finding the Fourth Proportional to 710,437.08, 980,417.28 and 388,167.18

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Solution

The fourth proportional to 710,437.08, 980,417.28 and 388,167.18 is: 535,678.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,437.08 : 980,417.28 = 388,167.18 : x
  2. Step 2: Convert to fraction form
    710,437.08/980,417.28 = 388,167.18/x
  3. Step 3: Cross multiply
    710,437.08x = 980,417.28 × 388,167.18
  4. Step 4: Simplify right side
    710,437.08x = 380,565,810,800.87
  5. Step 5: Solve for x
    x = 380,565,810,800.87/710,437.08
  6. Step 6: Final answer
    x = 535,678.42

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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.