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Finding the Fourth Proportional to 261,030.80, 390,671.40 and 261,030.80

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Solution

The fourth proportional to 261,030.80, 390,671.40 and 261,030.80 is: 390,671.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,030.80 : 390,671.40 = 261,030.80 : x
  2. Step 2: Convert to fraction form
    261,030.80/390,671.40 = 261,030.80/x
  3. Step 3: Cross multiply
    261,030.80x = 390,671.40 × 261,030.80
  4. Step 4: Simplify right side
    261,030.80x = 101,977,268,079.12
  5. Step 5: Solve for x
    x = 101,977,268,079.12/261,030.80
  6. Step 6: Final answer
    x = 390,671.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.