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Finding the Fourth Proportional to 710,230.95, 980,142.26 and 387,971.10

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Solution

The fourth proportional to 710,230.95, 980,142.26 and 387,971.10 is: 535,412.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,230.95 : 980,142.26 = 387,971.10 : x
  2. Step 2: Convert to fraction form
    710,230.95/980,142.26 = 387,971.10/x
  3. Step 3: Cross multiply
    710,230.95x = 980,142.26 × 387,971.10
  4. Step 4: Simplify right side
    710,230.95x = 380,266,868,828.83
  5. Step 5: Solve for x
    x = 380,266,868,828.83/710,230.95
  6. Step 6: Final answer
    x = 535,412.98

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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.