Home / 862,851.60-1,294,277.40-390,459.60

Finding the Fourth Proportional to 862,851.60, 1,294,277.40 and 390,459.60

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Solution

The fourth proportional to 862,851.60, 1,294,277.40 and 390,459.60 is: 585,689.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    862,851.60 : 1,294,277.40 = 390,459.60 : x
  2. Step 2: Convert to fraction form
    862,851.60/1,294,277.40 = 390,459.60/x
  3. Step 3: Cross multiply
    862,851.60x = 1,294,277.40 × 390,459.60
  4. Step 4: Simplify right side
    862,851.60x = 505,363,035,893.04
  5. Step 5: Solve for x
    x = 505,363,035,893.04/862,851.60
  6. Step 6: Final answer
    x = 585,689.40

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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.